What causes this issue?

The program checks if the new starting balances agree with the last end
balances. The new start balance (&V2& &V4&) of statement &V1& and the
last end balance (&V3& &V4& ) do not agree.

System Response

Processing was terminated. No change to the database.

How to fix this error?

Check whether you have selected the right bank statements, the right
amount, and specified the right action.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.