How can I auto reject a PR or PO stuck in pending approval status coz of no matching approval rules

Summary:

I have PR and PO approval rules configured. When requester is not selecting right GL codes associated to him the PR approval rules doesn't satisfy the condition and PR get's stuck in pending approval status forever. Whenever there is no approval rule triggered, i want to reject those PR's and PO's. Is it possible?? I was if i can create an any to reject such documents.

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