How we can make Project field as non mandatory on Requisition summary page

Summary:

For Requisitions(RSSP) We have made Project field as mandatory field from Project Stannard cost collection flex fields. We want this to be mandatory for requisition distribution only but it is also making this mandatory at Requisition Summary Page. I have tried to make non mandatory through VBCS also but no luck.

Do we have any other functionality which can make Project field non mandatory at Requisition summary page.

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Requisition Header

Code Snippet (add any code snippets that support your topic, if applicable):