reset signature status only if we need to check for modifications

product/ERP5SyncML/Engine/EngineMixin.py

@@ -187,6 +187,9 @@ class EngineMixin(object):
     if subscription.getAuthenticationState() != 'logged_in':
       # Workflow action
       subscription.login()
+    if subscription.getSyncmlAlertCode() not in ("one_way_from_server",
+                                                 "refresh_from_server_only"):
+      # Reset signature only if client send its modification to server
       subscription.initialiseSynchronization()
 
     # Create the package 1
@@ -435,6 +438,9 @@ class EngineMixin(object):
         next_anchor=subscriber.getNextAnchor())
 
       # Now that everything is ok, init sync information
+      if subscriber.getSyncmlAlertCode() not in ("one_way_from_client",
+                                                 "refresh_from_client_only"):
+        # Reset signature only if we have to check modifications on server side
         subscriber.initialiseSynchronization()
       # Server get sync commands from client first
       subscriber.processSyncRequest()