diff --git a/back/models/image.json b/back/models/image.json
index 047e5f5e4..57e33a684 100644
--- a/back/models/image.json
+++ b/back/models/image.json
@@ -26,7 +26,7 @@
         "nRefs": {
             "type": "Number",
             "required": true,
-            "default": 0
+            "default": 1
         }
     },
     "relations": {