Field Value Duplicity Validation Prior to New Form Submission

Hello,

I have a form where the user needs to inform the number of the invoice and attach the PDF file of the invoice. It is very comum for the user to attach invoices that have already been attached in the past. Is there any way I can configure a validation that prior to new submission in the form, it checks if there is already a same invoice registered in the past? If so, does not let the user submit it again? Thanks in advance for your support!

Best regards,

EP.

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