index only if we path

product/ERP5SyncML/Document/SyncMLSubscription.py

@@ -642,6 +642,7 @@ class SyncMLSubscription(XMLObject):
             last_anchor=self.getLastAnchor(),
             next_anchor=self.getNextAnchor())
     # Index signature with their new value
+    if len(path_list):
       self.SQLCatalog_indexSyncMLDocumentList(path_list)
 
   def _sendFinalMessage(self):