Reversal qty greater than qty invoiced to date: PO & item &

What causes this issue?

The sum of the reversal quantities which you entered in the individual
subitems of PO &V1&, item &V2& exceeds the quantity invoiced to date
of the relevant item. This is not allowed.

How to fix this error?

Please correct the reversal quantities in the individual account
assignments of PO &V1&, item &V2&.

Error message extract from SAP system. Copyright SAP SE.