diff --git a/loko/interventions/permissions.py b/loko/interventions/permissions.py
index b5f7433..2036e30 100644
--- a/loko/interventions/permissions.py
+++ b/loko/interventions/permissions.py
@@ -471,7 +471,7 @@ def get_allowed_update_fields(user, intervention):
 
     # Type d'intervention, Osiris, PMO, Assets
     if intervention.status_order < STATUS_ORDERS.get('validated') and any(role in user_roles for role in ['admin', 'manager', 'controller', 'external_manager', 'inspector']):
-        allowed_fields.update(['type', 'osiris', 'pmo_number'])
+        allowed_fields.update(['type', 'sub_type', 'osiris', 'pmo_number'])
 
     if intervention.status_order < STATUS_ORDERS.get('validated'):
         allowed_fields.add('category')
diff --git a/loko/interventions/static/interventions/detail/cms_edit_mode.js b/loko/interventions/static/interventions/detail/cms_edit_mode.js
index 5986e27..484f93c 100644
--- a/loko/interventions/static/interventions/detail/cms_edit_mode.js
+++ b/loko/interventions/static/interventions/detail/cms_edit_mode.js
@@ -10,6 +10,8 @@
     let isEditMode = false;
     let originalValues = {};
     let originalContractOptions = null; // Store original contract options for cancel
+    let originalSubtypeOptions = null;  // Store original subtype options for cancel
+    let originalSubtypeVisible = null;  // Store original subtype visibility for cancel
     let isSavingInProgress = false;
     let isAutoSavingAndNavigating = false;
     let isSubmittingAutoSavedForm = false;
@@ -29,6 +31,67 @@
 
     // Setup dynamic contract loading when provider changes
     setupProviderContractLink();
+    // Setup dynamic subtype loading/visibility when type changes
+    setupTypeSubtypeLink();
+
+    /**
+     * Setup the dynamic link between type and subtype selects.
+     * When the type changes, filter the subtype options and show/hide the subtype field.
+     */
+    function setupTypeSubtypeLink() {
+        const typeField = document.querySelector('.editable-field[data-field="type"]');
+        const subtypeField = document.querySelector('.editable-field[data-field="sub_type"]');
+        
+        if (!typeField || !subtypeField) return;
+        
+        const typeSelect = typeField.querySelector('.field-edit select');
+        const subtypeSelect = subtypeField.querySelector('.field-edit select');
+        
+        if (!typeSelect || !subtypeSelect) return;
+
+        let subtypes = [];
+        try {
+            if (subtypeField.dataset.subtypes) {
+                subtypes = JSON.parse(subtypeField.dataset.subtypes);
+            } else if (typeof interventionSubtypesData !== 'undefined') {
+                subtypes = interventionSubtypesData;
+            }
+        } catch (e) {
+            console.error('Error parsing subtypes:', e);
+        }
+
+        function updateSubtype(selectedType, keepValue) {
+            const available = subtypes.filter(st => !st.types || st.types.length === 0 || st.types.includes(selectedType));
+            const hasSubtypes = available.length > 0;
+
+            if (!hasSubtypes) {
+                subtypeField.classList.add('d-none');
+                subtypeSelect.value = '';
+            } else {
+                subtypeField.classList.remove('d-none');
+                const currentVal = subtypeSelect.value;
+                subtypeSelect.innerHTML = '<option value="">-</option>';
+                let valueStillValid = false;
+                available.forEach(st => {
+                    const opt = document.createElement('option');
+                    opt.value = String(st.id);
+                    opt.textContent = st.name;
+                    if (keepValue && String(st.id) === currentVal) {
+                        opt.selected = true;
+                        valueStillValid = true;
+                    }
+                    subtypeSelect.appendChild(opt);
+                });
+                if (keepValue && !valueStillValid) {
+                    subtypeSelect.value = '';
+                }
+            }
+        }
+
+        typeSelect.addEventListener('change', function() {
+            updateSubtype(this.value, false);
+        });
+    }
 
     /**
      * Setup the dynamic link between provider and contract selects.
@@ -130,6 +193,16 @@
             }
         }
         
+        // Store original subtype options and visibility
+        const subtypeField = document.querySelector('.editable-field[data-field="sub_type"]');
+        if (subtypeField) {
+            const subtypeSelect = subtypeField.querySelector('.field-edit select');
+            if (subtypeSelect) {
+                originalSubtypeOptions = subtypeSelect.innerHTML;
+            }
+            originalSubtypeVisible = !subtypeField.classList.contains('d-none');
+        }
+        
         // Store original values
         originalValues = {};
         editableFields.forEach(field => {
@@ -196,6 +269,22 @@
             }
         }
         
+        // Restore original subtype options and visibility
+        if (originalSubtypeOptions !== null) {
+            const subtypeField = document.querySelector('.editable-field[data-field="sub_type"]');
+            if (subtypeField) {
+                const subtypeSelect = subtypeField.querySelector('.field-edit select');
+                if (subtypeSelect) {
+                    subtypeSelect.innerHTML = originalSubtypeOptions;
+                }
+                if (originalSubtypeVisible) {
+                    subtypeField.classList.remove('d-none');
+                } else {
+                    subtypeField.classList.add('d-none');
+                }
+            }
+        }
+        
         // Restore original values
         editableFields.forEach(field => {
             const canEdit = field.dataset.canEdit === 'true';
@@ -234,6 +323,8 @@
         
         originalValues = {};
         originalContractOptions = null;
+        originalSubtypeOptions = null;
+        originalSubtypeVisible = null;
     }
 
     async function saveChanges(options = {}) {
diff --git a/loko/interventions/templates/interventions/add/_intervention_add_form.html b/loko/interventions/templates/interventions/add/_intervention_add_form.html
index 1f14bfd..4ad053b 100644
--- a/loko/interventions/templates/interventions/add/_intervention_add_form.html
+++ b/loko/interventions/templates/interventions/add/_intervention_add_form.html
@@ -335,6 +335,11 @@
                     {{ form.type }}
                     {{ form.type.errors }}
                 </div>
+                <div class="mb-3 d-none" id="sub_type_field_wrapper">
+                    <label for="id_sub_type" class="form-label">{% translate "Sous-type d'intervention" %}</label>
+                    {{ form.sub_type }}
+                    {{ form.sub_type.errors }}
+                </div>
             </div>
         </div>
     {% endif %}
diff --git a/loko/interventions/templates/interventions/add/_intervention_add_scripts.html b/loko/interventions/templates/interventions/add/_intervention_add_scripts.html
index 7bd67f7..00d711a 100644
--- a/loko/interventions/templates/interventions/add/_intervention_add_scripts.html
+++ b/loko/interventions/templates/interventions/add/_intervention_add_scripts.html
@@ -14,6 +14,7 @@
     const thematic = '{{ thematic.code }}';
     const symptomsData = {{ symptoms_data|safe }};
     const sourceCategoriesData = {{ source_categories_data|safe }};
+    const subtypesData = {{ subtypes_data|default:"[]"|safe }};
     const autocomplete_street_url = "{% url 'common:autocomplete_street' %}";
     var autocomplete_locations_url = "{% url 'assets:locations_autocomplete' %}?thematic={{ thematic.code }}{% if inspection_config %}&prioritize={% if inspection_config.default_category %}{{ inspection_config.default_category.code|lower }}{% else %}giep{% endif %}{% endif %}";
     var regional_roads_url = '{% url "common:get_regional_roads_geojson" %}';
@@ -54,6 +55,50 @@
     {% endif %}
 </script>
 
+<!-- Dynamic subtype filtering for intervention add form -->
+<script>
+    document.addEventListener('DOMContentLoaded', function() {
+        const typeSelect = document.getElementById('id_type');
+        const subTypeSelect = document.getElementById('id_sub_type');
+        const subTypeWrapper = document.getElementById('sub_type_field_wrapper');
+
+        if (!typeSelect || !subTypeSelect || !subTypeWrapper) return;
+
+        function updateSubTypeVisibility() {
+            const selectedType = typeSelect.value;
+            const available = (typeof subtypesData !== 'undefined' ? subtypesData : []).filter(st => 
+                !st.types || st.types.length === 0 || st.types.includes(selectedType)
+            );
+
+            if (available.length === 0) {
+                subTypeWrapper.classList.add('d-none');
+                subTypeSelect.value = '';
+            } else {
+                subTypeWrapper.classList.remove('d-none');
+                const currentVal = subTypeSelect.value;
+                subTypeSelect.innerHTML = '<option value="">---------</option>';
+                let valueStillValid = false;
+                available.forEach(st => {
+                    const opt = document.createElement('option');
+                    opt.value = String(st.id);
+                    opt.textContent = st.name;
+                    if (String(st.id) === currentVal) {
+                        opt.selected = true;
+                        valueStillValid = true;
+                    }
+                    subTypeSelect.appendChild(opt);
+                });
+                if (!valueStillValid && currentVal) {
+                    subTypeSelect.value = '';
+                }
+            }
+        }
+
+        typeSelect.addEventListener('change', updateSubTypeVisibility);
+        updateSubTypeVisibility();
+    });
+</script>
+
 <!-- intervention_add.js (split) -->
 <script src="{% static 'interventions/add/map.js' %}"></script>
 <script src="{% static 'interventions/add/source.js' %}"></script>
diff --git a/loko/interventions/templates/interventions/detail/card_info.html b/loko/interventions/templates/interventions/detail/card_info.html
index bec750c..85a009e 100644
--- a/loko/interventions/templates/interventions/detail/card_info.html
+++ b/loko/interventions/templates/interventions/detail/card_info.html
@@ -498,6 +498,31 @@
                                 </select>
                             </div>
                         </div>
+
+                        <!-- Sous-type d'intervention -->
+                        <div class="d-flex align-items-center editable-field {% if not has_subtypes_for_current_type %}d-none{% endif %}" 
+                             id="intervention-subtype-field" 
+                             data-field="sub_type" 
+                             data-subtypes="{{ subtypes_data_json|escape }}"
+                             data-can-edit="{% if 'sub_type' in allowed_update_fields %}true{% else %}false{% endif %}">
+                            <button class="btn btn-sm border-0" style="cursor: default;"><i class="bi bi-tag"></i></button>
+                            <span class="label mx-1">{% translate "Sous-type" %}:</span>
+                            <div class="field-display">
+                                <span class="field-value">{{ intervention.sub_type.get_name|default:"-" }}</span>
+                            </div>
+                            <div class="field-edit d-none" style="flex: 1;">
+                                <select class="form-select form-select-sm" id="intervention-subtype-select">
+                                    <option value="">-</option>
+                                    {% for st in sub_types %}
+                                        {% if not st.intervention_types or intervention.type in st.intervention_types %}
+                                        <option value="{{ st.id }}" {% if st.id == intervention.sub_type_id %}selected{% endif %}>
+                                            {{ st.get_name }}
+                                        </option>
+                                        {% endif %}
+                                    {% endfor %}
+                                </select>
+                            </div>
+                        </div>
                         <!-- Catégorie -->
                         <div class="d-flex align-items-center editable-field" data-field="category" data-can-edit="{% if 'category' in allowed_update_fields %}true{% else %}false{% endif %}">
                             <button class="btn btn-sm border-0" style="cursor: default;"><i class="bi bi-tags"></i></button>
diff --git a/loko/interventions/templates/interventions/detail/scripts.html b/loko/interventions/templates/interventions/detail/scripts.html
index c397211..9a9422d 100644
--- a/loko/interventions/templates/interventions/detail/scripts.html
+++ b/loko/interventions/templates/interventions/detail/scripts.html
@@ -23,6 +23,7 @@
         const recommendedNextStatus = '{{ recommended_next_status }}';
         const interventionId = '{{ intervention.id }}';
         const interventionThematicId = {% if intervention.thematic %}{{ intervention.thematic.id }}{% else %}null{% endif %};
+        const interventionSubtypesData = {{ subtypes_data_json|default:"[]"|safe }};
         const allowed_transitions = {{ allowed_transitions|safe }};
         const canViewPrices = {{ can_view_prices|yesno:"true,false" }};
         var contractId = {% if contract_id %} {{ contract_id }} {% else %} null {% endif %};
diff --git a/loko/interventions/tests/test_inspections.py b/loko/interventions/tests/test_inspections.py
index 37e796d..ed39622 100644
--- a/loko/interventions/tests/test_inspections.py
+++ b/loko/interventions/tests/test_inspections.py
@@ -645,6 +645,165 @@ class InterventionSubTypeTests(TestCase):
             display_univ = admin_instance.types_display(self.subtype_universal)
             self.assertEqual(str(display_univ), "Tous")
 
+    def test_update_intervention_field_subtype(self):
+        from interventions.models import Intervention
+        from interventions.views.helpers import _update_intervention_field
+
+        intervention = Intervention.objects.create(
+            title='Test SubType Update',
+            type='repair',
+            thematic=self.thematic,
+            status='in_preparation',
+        )
+
+        # 1. Setting compatible subtype succeeds
+        success, err = _update_intervention_field(intervention, 'sub_type', str(self.subtype_multi.id))
+        self.assertTrue(success)
+        self.assertIsNone(err)
+        self.assertEqual(intervention.sub_type, self.subtype_multi)
+
+        # 2. Setting universal subtype succeeds
+        success, err = _update_intervention_field(intervention, 'sub_type', str(self.subtype_universal.id))
+        self.assertTrue(success)
+        self.assertEqual(intervention.sub_type, self.subtype_universal)
+
+        # 3. Setting incompatible subtype fails
+        success, err = _update_intervention_field(intervention, 'sub_type', str(self.subtype_build_only.id))
+        self.assertFalse(success)
+        self.assertIn("non compatible", err)
+        # Old value unchanged
+        self.assertEqual(intervention.sub_type, self.subtype_universal)
+
+        # 4. Setting empty string clears subtype
+        success, err = _update_intervention_field(intervention, 'sub_type', "")
+        self.assertTrue(success)
+        self.assertIsNone(intervention.sub_type)
+
+    def test_type_change_resets_incompatible_subtype(self):
+        from interventions.models import Intervention
+        from interventions.views.helpers import _update_intervention_field
+
+        intervention = Intervention.objects.create(
+            title='Test SubType Incompatible Reset',
+            type='repair',
+            sub_type=self.subtype_multi,
+            thematic=self.thematic,
+            status='in_preparation',
+        )
+        self.assertEqual(intervention.sub_type, self.subtype_multi)
+
+        # Change type to 'build' (incompatible with subtype_multi ['repair', 'fixing'])
+        success, err = _update_intervention_field(intervention, 'type', 'build')
+        self.assertTrue(success)
+        self.assertEqual(intervention.type, 'build')
+        self.assertIsNone(intervention.sub_type)
+
+    def test_permissions_includes_sub_type(self):
+        from interventions.models import Intervention
+        from interventions.permissions import get_allowed_update_fields
+        from common.models import UserConfig, Role
+
+        admin_role, _ = Role.objects.get_or_create(name='admin')
+        user_config, _ = UserConfig.objects.get_or_create(user=self.user)
+        user_config.roles.add(admin_role)
+        user_config.is_intern = True
+        user_config.save()
+
+        intervention = Intervention.objects.create(
+            title='Test Perms',
+            type='repair',
+            thematic=self.thematic,
+            status='in_preparation',
+        )
+        allowed_fields = get_allowed_update_fields(self.user, intervention)
+        self.assertIn('type', allowed_fields)
+        self.assertIn('sub_type', allowed_fields)
+
+    def test_detail_view_subtypes_context(self):
+        from interventions.models import Intervention
+        from common.models import UserConfig, Role
+        import json
+
+        admin_role, _ = Role.objects.get_or_create(name='admin')
+        user_config, _ = UserConfig.objects.get_or_create(user=self.user)
+        user_config.roles.add(admin_role)
+        user_config.is_intern = True
+        user_config.save()
+
+        # 1. Intervention with type 'repair' (has matching subtypes: sub_multi, sub_univ)
+        interv_repair = Intervention.objects.create(
+            title='Detail View Subtype Test',
+            type='repair',
+            thematic=self.thematic,
+            status='in_preparation',
+            created_by=self.user,
+        )
+
+        self.client.force_login(self.user)
+        response = self.client.get(reverse('interventions:intervention_detail', args=[interv_repair.id]))
+        self.assertEqual(response.status_code, 200)
+        self.assertTrue(response.context['has_subtypes_for_current_type'])
+        subtypes_in_json = json.loads(response.context['subtypes_data_json'])
+        self.assertTrue(any(s['id'] == self.subtype_multi.id for s in subtypes_in_json))
+
+        # 2. Deactivate universal subtype to test type without subtypes
+        self.subtype_universal.is_active = False
+        self.subtype_universal.save()
+
+        interv_cleaning = Intervention.objects.create(
+            title='Detail View No Subtype Test',
+            type='cleaning',
+            thematic=self.thematic,
+            status='in_preparation',
+            created_by=self.user,
+        )
+        response_cleaning = self.client.get(reverse('interventions:intervention_detail', args=[interv_cleaning.id]))
+        self.assertEqual(response_cleaning.status_code, 200)
+        self.assertFalse(response_cleaning.context['has_subtypes_for_current_type'])
+
+    def test_update_intervention_endpoint_subtype(self):
+        from interventions.models import Intervention
+        from common.models import UserConfig, Role
+        import json
+
+        admin_role, _ = Role.objects.get_or_create(name='admin')
+        user_config, _ = UserConfig.objects.get_or_create(user=self.user)
+        user_config.roles.add(admin_role)
+        user_config.is_intern = True
+        user_config.save()
+
+        intervention = Intervention.objects.create(
+            title='API Update Subtype Test',
+            type='repair',
+            thematic=self.thematic,
+            status='in_preparation',
+            created_by=self.user,
+        )
+
+        self.client.force_login(self.user)
+        url = reverse('interventions:update_intervention', args=[intervention.id])
+        
+        # Batch update sub_type
+        response = self.client.post(
+            url,
+            data=json.dumps({'sub_type': str(self.subtype_multi.id)}),
+            content_type='application/json',
+        )
+        self.assertEqual(response.status_code, 200)
+        intervention.refresh_from_db()
+        self.assertEqual(intervention.sub_type, self.subtype_multi)
+
+        # Batch update type and sub_type together: switch type to 'build' and sub_type to sub_build
+        response = self.client.post(
+            url,
+            data=json.dumps({'type': 'build', 'sub_type': str(self.subtype_build_only.id)}),
+            content_type='application/json',
+        )
+        self.assertEqual(response.status_code, 200)
+        intervention.refresh_from_db()
+        self.assertEqual(intervention.type, 'build')
+        self.assertEqual(intervention.sub_type, self.subtype_build_only)
+
 
 
 
diff --git a/loko/interventions/views/detail.py b/loko/interventions/views/detail.py
index 02928fe..f10c319 100644
--- a/loko/interventions/views/detail.py
+++ b/loko/interventions/views/detail.py
@@ -54,7 +54,7 @@ from common.private_files.helpers import build_private_url
 from common.utils import get_short_name
 
 from interventions.models import (InterventionSubscription, Intervention, InterventionAsset, InterventionTimeLine, InterventionContractPost, InterventionDocument, InterventionNote, InterventionLocation,
-                     InterventionLink,
+                     InterventionLink, InterventionSubType,
                      ContractPauseReasonAssignment,
                      Symptom, SourceCategory, InterventionPlanificationTimeLine, InterventionRealizationTimeLine,
                      InterventionOccupation,
@@ -632,6 +632,20 @@ def intervention_detail(request, intervention_id):
 
     sequenced_data = get_sequenced_intervention_documents(intervention, notes_qs=notes)
 
+    sub_types_qs = InterventionSubType.objects.filter(is_active=True, thematic=intervention.thematic).order_by('order_number', 'name_fr')
+    subtypes_data = [
+        {
+            'id': st.id,
+            'name': st.get_name(),
+            'types': st.intervention_types,
+        }
+        for st in sub_types_qs
+    ]
+    has_subtypes_for_current_type = any(
+        not st.intervention_types or intervention.type in st.intervention_types
+        for st in sub_types_qs
+    )
+
     context = {
         "intervention": intervention,
         "status_choices" : [{"key": key, "label": label} for key, label in STATUS_CHOICES.items()],
@@ -663,6 +677,9 @@ def intervention_detail(request, intervention_id):
         'contracts': contracts,
         'maintain_choices': MAINTAIN_CHOICES,
         'type_choices': get_type_choices(intervention.thematic),
+        'sub_types': sub_types_qs,
+        'subtypes_data_json': _json_mod.dumps(subtypes_data),
+        'has_subtypes_for_current_type': has_subtypes_for_current_type,
         'origin_type_choices': ORIGIN_TYPE_CHOICES,
         'priority_choices': Intervention._meta.get_field('priority').choices,
         'symptoms': Symptom.objects.filter(is_active=True, thematic=intervention.thematic).order_by('name_fr'),
@@ -1694,6 +1711,16 @@ def interventions_add(request, thematic_code):
         for sc in SourceCategory.objects.filter(is_active=True)
     ]
 
+    subtypes_qs = InterventionSubType.objects.filter(thematic=thematic, is_active=True).order_by('order_number', 'name_fr')
+    subtypes_data = [
+        {
+            "id": st.id,
+            "name": st.get_name(),
+            "types": st.intervention_types,
+        }
+        for st in subtypes_qs
+    ]
+
     if request.method == 'POST':
         maintain_type = request.POST.get('maintain_type', 'corrective')
         form = InterventionForm(request.POST, request.FILES, thematic=thematic, user=request.user)
@@ -2017,7 +2044,7 @@ def interventions_add(request, thematic_code):
             for key in [
                 'title', 'lat', 'lon', 'address', 'asset_category', 'status',
                 'source_category', 'source_ref', 'source_detail', 'init_description',
-                'type', 'origin_type', 'priority'
+                'type', 'sub_type', 'origin_type', 'priority'
             ]:
                 val = request.GET.get(key)
                 if val not in (None, ""):
@@ -2093,6 +2120,7 @@ def interventions_add(request, thematic_code):
                     'thematic': thematic,
                     'symptoms_data': json.dumps(symptoms_data),
                     'source_categories_data': json.dumps(source_categories_data),
+                    'subtypes_data': json.dumps(subtypes_data),
                     'maintain_type': maintain_type,
                     'observation': observation,
                     'observation_photos': observation_photos,
@@ -2654,14 +2682,18 @@ def update_intervention(request, intervention_id):
             # Handle notes separately (special case)
             notes_data = data.pop('notes', None)
             
-            # Sort fields to process assigned_provider before contract
+            # Sort fields to process assigned_provider before contract, and type before sub_type
             def _field_priority(item):
                 f_name = item[0]
                 if f_name == 'assigned_provider':
                     return 0
                 if f_name == 'contract':
                     return 1
-                return 2
+                if f_name == 'type':
+                    return 2
+                if f_name == 'sub_type':
+                    return 3
+                return 4
 
             for field, new_value in sorted(data.items(), key=_field_priority):
                 if field not in allowed_update_fields:
diff --git a/loko/interventions/views/helpers.py b/loko/interventions/views/helpers.py
index 7c91f27..b62dd00 100644
--- a/loko/interventions/views/helpers.py
+++ b/loko/interventions/views/helpers.py
@@ -54,7 +54,7 @@ from common.private_files.helpers import build_private_url
 from common.utils import get_short_name
 
 from interventions.models import (InterventionSubscription, Intervention, InterventionAsset, InterventionTimeLine, InterventionContractPost, InterventionDocument, InterventionNote, InterventionLocation,
-                     InterventionLink,
+                     InterventionLink, InterventionSubType,
                      ContractPauseReasonAssignment,
                      Symptom, SourceCategory, InterventionPlanificationTimeLine, InterventionRealizationTimeLine,
                      InterventionOccupation,
@@ -2604,9 +2604,32 @@ def _update_intervention_field(intervention, field, new_value, user_config=None)
         allowed_types = dict(get_type_choices(intervention.thematic)).keys()
         if new_value in allowed_types:
             intervention.type = new_value
+            if intervention.sub_type and intervention.sub_type.intervention_types:
+                if new_value not in intervention.sub_type.intervention_types:
+                    intervention.sub_type = None
             return True, None
         return False, _('Type not found')
         
+    elif field == "sub_type":
+        if new_value in ("", None, "null"):
+            intervention.sub_type = None
+            return True, None
+        try:
+            sub_type_id = int(new_value)
+            sub_type = InterventionSubType.objects.filter(
+                id=sub_type_id,
+                is_active=True,
+                thematic=intervention.thematic,
+            ).first()
+            if not sub_type:
+                return False, _('Sous-type introuvable')
+            if sub_type.intervention_types and intervention.type not in sub_type.intervention_types:
+                return False, _("Sous-type non compatible avec le type d'intervention")
+            intervention.sub_type = sub_type
+            return True, None
+        except (ValueError, TypeError):
+            return False, _('Sous-type invalide')
+        
     elif field == "origin_type":
         if new_value in dict(ORIGIN_TYPE_CHOICES).keys():
             intervention.origin_type = new_value