diff --git a/orientation/orientation.py b/orientation/orientation.py
index 2326839..65ec783 100644
--- a/orientation/orientation.py
+++ b/orientation/orientation.py
@@ -288,13 +288,15 @@ class Orientation:
                 else:
                     deleted_fields.append(field_name)
 
-            # On réexplose les champs sans doublons
-            layer = processing.run("native:explodehstorefield",
-                                   parameters={"INPUT": layers[osm_name],
-                                               "FIELD": "other_tags",
-                                               "OUTPUT": "memory:",
-                                               "EXPECTED_FIELDS": ",".join(expected_fields)},
-                                   context=context)["OUTPUT"]
+            # S'il y a des doublons
+            if len(deleted_fields) > 0:
+                # On réexplose les champs sans doublons
+                layer = processing.run("native:explodehstorefield",
+                                       parameters={"INPUT": layers[osm_name],
+                                                   "FIELD": "other_tags",
+                                                   "OUTPUT": "memory:",
+                                                   "EXPECTED_FIELDS": ",".join(expected_fields)},
+                                       context=context)["OUTPUT"]
 
             # On enregistre le layer dans le gpkg
             options.layerName = layer_name