WorkflowTool.py: during convertion, do not add prefix to causality state id.

product/ERP5/Tool/WorkflowTool.py

@@ -389,9 +389,8 @@ class WorkflowTool(BaseTool, OriginalWorkflowTool):
             elif key == 'causality_state':
               state_id_list = []
               for value in values:
-                state_id = 'state_'+value
-                state_id_list.append(state_id)
-              worklist.setMatchedCausalityStateList(state_id_list)
+                state_id = value
+              worklist.setMatchedCausalityState(state_id)
           worklist.setActboxUrl(qdef.actbox_url)
           worklist.setActboxCategory(qdef.actbox_category)
           worklist.setActboxIcon(qdef.actbox_icon)