vCAC catalog item parameter in the form of drop down is not getting dynamically refreshed but the same parameter gets refreshed when the workflow is invoked in vCO

I have an existing workflow on vCO whose input parameter in the form of drop down is  getting populated dynamically through an action which internally calls another workflow . I have imported the workflow into vCAC as a catalog item.

The parameter returns new values on the vCO when I invoke the workflow there . But, on the catalog item in vCAC the parameter does not get refreshed with the new values . Any pointers will help .