diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/tasks.py b/SAS/TMSS/backend/src/tmss/tmssapp/tasks.py
index 00eb61219635a560285ff8d5e1c487251f561fd7..ab7a2eed3c5e5f98c9067b21e96c789572dfa33d 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/tasks.py
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/tasks.py
@@ -31,7 +31,7 @@ def create_scheduling_unit_draft_from_observing_strategy_template(strategy_templ
         allowed_overrides = subdict_of_pointer_items(requirements_doc_overrides, parameter_pointers)
 
         if allowed_overrides != requirements_doc_overrides:
-            raise InvalidSpecificationException("Specified too many overrides.\nThese are the allowed overridable parameters: \n%s\nSubmitted overrides:%s" % (
+            raise InvalidSpecificationException("Specified faulty overrides. These are the allowed overridable parameters: \n%s\nSubmitted overrides:%s" % (
                                                 '\n'.join([str(p) for p in parameter_pointers]), requirements_doc_overrides))
 
         # do the actual override of the remaining allowed items