Getting error while creating the requisition (IRC_1590143)

Summary:

Organization is Invalid. Enter a valid value (IRC_1590143)

Content (required):

Recruiter is trying to create and post the req and it is errors out for field org which is usually the BU.

Here is the error - Organization is Invalid. Enter a valid value (IRC_1590143) and attached screenshot as well.

Did anyone face this and know how to fix it?

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