Accrual already run for contract &1 on key date &2

What causes this issue?

Accrual/deferral was already run for contract &v1& on key date &v2&.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

If the message is set up as a warning, then accrual/deferral is run
again for the contract.
If the message is set up as an error message, then accrual/deferral is
not run again for the contract. The system considers the contract during
the next regular accrual run.
INCLUDE RECA_CUSTOMIZED_MESSAGE_INFO OBJECT DOKU ID TX

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.