Reporting point/operation &: WIP cannot be negative

What causes this issue?

The quantity delivered exceeds the quantity confirmed at the reporting
points in this period.
The <DS:GLOS.work_in_process>work in process</> which the system
created for the confirmed quantity was canceled on the basis of the
quantity of goods delivered. Because the quantity of goods delivered
exceeds the confirmed quantity, the system canceled more work in
process than it originally created.

System Response

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

How to fix this error?

Check the reporting point quantity for transaction &v1& and confirm
again if necessary.

Error message extract from SAP system. Copyright SAP SE.