ERP5Workflow: get...TypeList should not return multiple times the same value

product/ERP5/ERP5Site.py

@@ -776,7 +776,7 @@ class ERP5Site(FolderMixIn, CMFSite, CacheCookieMixin):
         for state in wf.getStateValueList():
           if group in state.getStateTypeList():
             state_list.append(state.getReference())
-      return tuple(state_list)
+      return tuple(set(state_list))
 
     getStateList = CachingMethod(getStateList,
                                  id=('_getPortalGroupedStateList', group),
@@ -1302,7 +1302,7 @@ class ERP5Site(FolderMixIn, CMFSite, CacheCookieMixin):
           for state in wf.getStateValueList():
             if state.getStateTypeList():
               state_list.append(state.getReference())
-      return tuple(sorted_list)
+      return tuple(set(sorted_list))
 
     getStateList = CachingMethod(getStateList,
                                  id=('getPortalGroupedSimulationStateList'),