Accounting->Financial Accounting->Accounts Payable->Environment->Check information->Void-> Unused checks / Issue checks / Cancel payments

A cheque was generated for a vendor, but was voided because the amount is wrong. A new cheque is generated, but again it
was wrongly created. So, it needs to be voided but there is an error message during cancellation of this payment "Voided cheque cannot be processed".

When you void a cheque/checks you have to reverse and reset the payment document.

Accounting->Financial Accounting->Accounts Payable->Document->Reset Cleared items

After reversing, the payment documents becomes an open items (unfinished transactions) to be clear.

Then re-process the payment.

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