Record error with related action

So, I'm building a record where i have all the items in the store, then i can drill down to 1 item and update ir, but when i click on update item related action i get this error: 

An error occurred while applying the context for the AS Items In Store related action [identifier=21]. Details: No process parameter found corresponding to override [name=pv!item]. Non-parameter process variables cannot be overridden.

Any help?

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