diff --git a/test_tube_scanner/modules/capture_interface.py b/test_tube_scanner/modules/capture_interface.py
index ebabd62..2170bf7 100644
--- a/test_tube_scanner/modules/capture_interface.py
+++ b/test_tube_scanner/modules/capture_interface.py
@@ -108,6 +108,20 @@ class VideoCaptureInterface(abc.ABC):
             logger.error(f"Error creating tracker with conf {cfg}: {e}")
             self._tracker = None
     
+    def _flush_current_well(self, uuid=""):
+        """Stocke les résumés du puits courant — appelé avant tout changement."""
+        if not self._metrics or not self._params:
+            return
+        for pid, m in enumerate(self._metrics):
+            async_to_sync(self._client.store_summary)(
+                summary    = m.summary(),
+                experiment = self._params.experiment,
+                well       = self._params.well,
+                planarian  = pid,
+                uuid       = uuid,
+            )
+        self._metrics_.clear()    
+
 
     def on_well_change(self, cfg, uuid="", draw_contours=False):
         """
@@ -119,18 +133,10 @@ class VideoCaptureInterface(abc.ABC):
             return
         
         # 1. Sauvegarder les résumés du puits qu'on quitte
-        if self._metrics and self._params:
-            for pid, m in enumerate(self._metrics):               
-                async_to_sync(self._clientDB.store_summary)(
-                    summary    = m.summary(),
-                    experiment = self._params.experiment,
-                    well       = self._params.well,
-                    planarian  = pid,
-                    uuid       = uuid,
-                )      
+        self._flush_current_well(uuid)          # ← ferme le puits courant
         
-        # 2. Reconstruire pour le nouveau puits
-        params = cfg.to_params_dict()        
+        # 2. Reconstruire pour le nouveau puit _metrics_list
+        params = cfg.to_params_dict()
         self._params = ExperimentParams(params)        
         self._metrics = [self._params.build_metrics() for _ in range(self._params.planarian_count)]
         
@@ -144,6 +150,10 @@ class VideoCaptureInterface(abc.ABC):
             draw_contours = draw_contours,
         )
 
+    def on_scan_complete(self):
+        if self.use_tracking:
+            self._flush_current_well()          # ← ferme le dernier puits
+
     def set_draw_contours(self, draw: bool = True):
         if self._tracker:
             self._tracker.draw_contours = draw
diff --git a/test_tube_scanner/scanner/multiwell.py b/test_tube_scanner/scanner/multiwell.py
index 5d67132..de6a30e 100644
--- a/test_tube_scanner/scanner/multiwell.py
+++ b/test_tube_scanner/scanner/multiwell.py
@@ -146,19 +146,20 @@ class MultiWellManager:
         
     #def _grid_scanning_capture(self, uuid, duration):
     def _grid_scanning_capture(self, experiment, well_position, simulate=False):
+        uuid = None
         try:
             well = well_position.well
             multiwell = experiment.multiwell
             
+            ## create uuid for this capture
+            uuid = f'{self.process.data.session}-{multiwell.position}-{well.name}'
+            
             if self.process.use_tracking:               
                 cfg = ExperimentConfig.objects.filter(experiment_key_id=experiment.id, well=well.name).first()
                 if not cfg:
                     raise Exception(f"Configuration d'expérience introuvable pour {experiment} / {well}")
                 # reset PlanarianTracker => on_well_change
-                self.process.cam.on_well_change(cfg, draw_contours=False)
-
-            ## create uuid for this capture
-            uuid = f'{self.process.data.session}-{multiwell.position}-{well.name}'
+                self.process.cam.on_well_change(cfg, uuid=uuid, raw_contours=False)
               
             ## start recording   
             self.process.data.uuid = uuid
@@ -176,14 +177,18 @@ class MultiWellManager:
                 if time.monotonic() - start > experiment.duration:
                     break
                 self.cnc_controller.wait_for(0.1)
-                
+            
+            self.process.cam._flush_current_well(uuid)
+            
             self.process.data.record = False
             self.process.data.uuid = None
-            
+
             msg = f"{uuid}: capture done..."
         except Exception as e:
             msg = f"error during capture - {e}"
             logger.error(msg)
+        finally:
+            self.process.cam._flush_current_well(uuid)
 
         logger.info(msg)
         self.process._send(scan_state=msg)