Add Assignment or Add Employee Work Relationship candidates are not getting automatically processed

Summary:

Hi Team,

We are trying to hire a current active non worker as an employee with additional assigment and hence while creating offer we are using Add Assignment or Add Employee Work Relationship as action but when the record is moved to HR, the statu is changed to "HR, Pending Manual Processing" which is fine but when I click on "Add Assignment" from there it is showing this warning and not giving me option to add it from manage job offers page itself:

Is there any such restriction?

Thank you,

Shikha

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