Sometimes the "Cancel" icon is engaged, which makes it impossible to cancel the supplier payment.

This is the case when the period in which the payment to be reversed is located is subject to a closed bank reconciliation. It is not necessary for the transaction to be selected as part of the period's disbursements in the bank reconciliation to prevent its reversal. It is sufficient that the bank reconciliation for the period in question is completed and closed to prevent the transaction from being reversed.

Result:

In order to make the "Cancel" icon available again and to be able to cancel the supplier payment, the bank reconciliation of the period in which the payment in question is located must be reopen.