TMSS-745: minor fix on message

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