You cannot reverse billing orders reversed for adjustment

What causes this issue?

One or more billing orders exists for the selected entry whose
allocated billing documents within billing were reversed for
adjustment.
These billing orders cannot be directly reversed.

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?

Call up the transaction again after reversing the meter reading. It
will contain a list of the objects that were not deleted. Use the
detail display for the billing orders to determine the corresponding
document numbers for the adjustment reversal. You can release the
billing orders to be reversed using the transaction "Delete adjustment
reversal document number from the billing order".

Error message extract from SAP system. Copyright SAP SE.