diff --git a/passerelle/contrib/caluire_axel/models.py b/passerelle/contrib/caluire_axel/models.py
index 81127d47..a7c0df6d 100644
--- a/passerelle/contrib/caluire_axel/models.py
+++ b/passerelle/contrib/caluire_axel/models.py
@@ -839,6 +839,84 @@ class CaluireAxel(BaseResource):
 
         return updated
 
+    def _set_agenda(self, child_id, start_date, end_date, activities_data, current_agenda, booking_list):
+        # check exclusive activities (GARDERIES and ETUDES)
+        # build list of requested booked days
+        exclusive_activities = defaultdict(set)
+        for booking in booking_list:
+            _child_id, activity_id, day = booking.split(':')
+            if _child_id != child_id:
+                continue
+            if activity_id not in ['GARDERIES', 'ETUDES']:
+                continue
+            exclusive_activities[day].add(booking)
+        # build list of existing booked days
+        legacy_exclusive_activities = defaultdict(set)
+        for activity_id in ['GARDERIES', 'ETUDES']:
+            legacy_agenda = current_agenda.get(activity_id) or []
+            for booking in legacy_agenda:
+                if booking['prefill'] is not True:
+                    continue
+                _child_id, activity_id, day = booking['id'].split(':')
+                if _child_id != child_id:
+                    continue
+                if activity_id not in ['GARDERIES', 'ETUDES']:
+                    continue
+                legacy_exclusive_activities[day].add(booking['id'])
+        # check booking exclusivity for changes only
+        for day, bookings in exclusive_activities.items():
+            if len(legacy_exclusive_activities.get(day) or []) > 1:
+                # it was already booked in Axel ...
+                continue
+            if len(bookings) > 1:
+                raise APIError(
+                    'not possible to book %s the same day' % ' and '.join(sorted(list(bookings))),
+                    err_code='bad-request',
+                    http_status=400,
+                )
+
+        updated = []
+        for activity in activities_data.get('ACTIVITE', []):
+            activity_id = activity['IDENTACTIVITE']
+            if activity_id.startswith('CJ'):
+                # mercredi or vacances: not bookable
+                continue
+            bookings = self.set_bookings(
+                child_id,
+                activity_id,
+                start_date,
+                end_date,
+                booking_list,
+                legacy_agenda=current_agenda[activity_id],
+            )
+            for booking in bookings:
+                booking['activity_label'] = activity['LIBELLEACTIVITE']
+                booking['activity_type'] = self.get_activity_type(activity_id)
+            updated += bookings
+
+        # sort changes
+        activity_types = ['matin', 'midi', 'soir']
+        updated = [
+            (
+                not u['booked'],
+                activity_types.index(u['activity_type']),
+                u['day'],
+                u,
+            )
+            for u in updated
+        ]
+        updated = sorted(updated, key=itemgetter(0, 1, 2))
+        updated = [u for b, a, d, u in updated]
+        updated = [
+            {'booked': u['booked'], 'activity_label': u['activity_label'], 'day': u['day']} for u in updated
+        ]
+
+        return {
+            'updated': True,
+            'count': len(updated),
+            'changes': updated,
+        }
+
     @endpoint(
         display_category=_('Schooling'),
         display_order=8,
@@ -875,82 +953,9 @@ class CaluireAxel(BaseResource):
                 continue
             agenda[activity_id] = self.get_bookings(child_id, activity_id, start_date, end_date)
 
-        # check exclusive activities (GARDERIES and ETUDES)
-        # build list of requested booked days
-        exclusive_activities = defaultdict(set)
-        for booking in post_data['booking_list']:
-            _child_id, activity_id, day = booking.split(':')
-            if _child_id != child_id:
-                continue
-            if activity_id not in ['GARDERIES', 'ETUDES']:
-                continue
-            exclusive_activities[day].add(booking)
-        # build list of existing booked days
-        legacy_exclusive_activities = defaultdict(set)
-        for activity_id in ['GARDERIES', 'ETUDES']:
-            legacy_agenda = agenda.get(activity_id) or []
-            for booking in legacy_agenda:
-                if booking['prefill'] is not True:
-                    continue
-                _child_id, activity_id, day = booking['id'].split(':')
-                if _child_id != child_id:
-                    continue
-                if activity_id not in ['GARDERIES', 'ETUDES']:
-                    continue
-                legacy_exclusive_activities[day].add(booking['id'])
-        # check booking exclusivity for changes only
-        for day, bookings in exclusive_activities.items():
-            if len(legacy_exclusive_activities.get(day) or []) > 1:
-                # it was already booked in Axel ...
-                continue
-            if len(bookings) > 1:
-                raise APIError(
-                    'not possible to book %s the same day' % ' and '.join(sorted(list(bookings))),
-                    err_code='bad-request',
-                    http_status=400,
-                )
-
-        updated = []
-        for activity in activities_data.get('ACTIVITE', []):
-            activity_id = activity['IDENTACTIVITE']
-            if activity_id.startswith('CJ'):
-                # mercredi or vacances: not bookable
-                continue
-            bookings = self.set_bookings(
-                child_id,
-                activity_id,
-                start_date,
-                end_date,
-                post_data['booking_list'],
-                legacy_agenda=agenda[activity_id],
-            )
-            for booking in bookings:
-                booking['activity_label'] = activity['LIBELLEACTIVITE']
-                booking['activity_type'] = self.get_activity_type(activity_id)
-            updated += bookings
-
-        # sort changes
-        activity_types = ['matin', 'midi', 'soir']
-        updated = [
-            (
-                not u['booked'],
-                activity_types.index(u['activity_type']),
-                u['day'],
-                u,
-            )
-            for u in updated
-        ]
-        updated = sorted(updated, key=itemgetter(0, 1, 2))
-        updated = [u for b, a, d, u in updated]
-        updated = [
-            {'booked': u['booked'], 'activity_label': u['activity_label'], 'day': u['day']} for u in updated
-        ]
-
-        return {
-            'updated': True,
-            'count': len(updated),
-            'changes': updated,
-        }
+        return self._set_agenda(
+            child_id, start_date, end_date, activities_data, agenda, post_data['booking_list']
+        )
 
     @endpoint(
         display_category=_('Schooling'),