diff --git a/product/CMFActivity/Activity/SQLDict.py b/product/CMFActivity/Activity/SQLDict.py
index 6f2258c1552f7304ab2437be3135c25f660a0a71..e0f70d4f10e9becd9f168c78c248509506dfe81d 100644
--- a/product/CMFActivity/Activity/SQLDict.py
+++ b/product/CMFActivity/Activity/SQLDict.py
@@ -569,8 +569,11 @@ class SQLDict(RAMDict, SQLBase):
           method_dict[line_method_id] = 1
           m = self.loadMessage(line.message, uid = line.uid)
           if invoke:
-            # First Validate
-            validate_value = m.validate(self, activity_tool)
+            # First Validate (only if message is marked as new)
+            if line.processing_node == -1:
+              validate_value = m.validate(self, activity_tool)
+            else:
+              validate_value = VALID
 #             LOG('SQLDict.flush validate_value',0,validate_value)
             if validate_value is VALID:
               activity_tool.invoke(m) # Try to invoke the message - what happens if invoke calls flushActivity ??
diff --git a/product/CMFActivity/Activity/SQLQueue.py b/product/CMFActivity/Activity/SQLQueue.py
index d222636263fa0cc849ecb80a1694b4bbcdf87e7d..6b11370ce1b81f474d5c398b419dc588cdd137ac 100644
--- a/product/CMFActivity/Activity/SQLQueue.py
+++ b/product/CMFActivity/Activity/SQLQueue.py
@@ -376,8 +376,11 @@ class SQLQueue(RAMQueue, SQLBase):
       for m in activity_tool.getRegisteredMessageList(self):
         if object_path == m.object_path and (method_id is None or method_id == m.method_id):
           if invoke:
-            # First Validate
-            validate_value = m.validate(self, activity_tool)
+            # First Validate (only if message is marked as new)
+            if line.processing_node == -1:
+              validate_value = m.validate(self, activity_tool)
+            else:
+              validate_value = VALID
             if validate_value is VALID:
               activity_tool.invoke(m) # Try to invoke the message - what happens if invoke calls flushActivity ??
               if m.is_executed != MESSAGE_EXECUTED:                                                 # Make sure message could be invoked