Evaluated receipt settlement is active for purchase order & &

What causes this issue?

You are trying to enter an invoice for purchase order &V1& &V2&.
Evaluated receipt settlement (ERS) has been defined for this purchase
order.
INCLUDE MM_IV_MELDUNGEN OBJECT DOKU ID TX

How to fix this error?

Check whether you have entered the correct purchase order number.
If the purchase order number is wrong:
If you have received this message in the multiple selection screen,
choose <LS>New entry</> and correct the purchase order number.
If you have received this message on the supplier screen, choose
<LS>Cancel</>. The initial screen reappears.
If the purchase order number is correct:
You can enter the invoice manually, even though ERS has been defined.
Remember, however, that no evaluated receipt settlement can take place
for those items for which an invoice has been entered manually. If you
wish to enter an invoice manually, acknowledge the message by pressing
enter. If not, cancel the transaction and return the invoice to the
supplier
If you are cancelling an invoice, check the document number entered and
correct it if necessary. If the document number is correct, display the
document and check whether it was posted manually or in the evaluated
receipt settlement run.
If the document was posted manually
If you cancel the document, the quantity to be invoiced can be posted by
ERS.
Example: A goods receipt is posted for a purchase order for which ERS
was defined. By mistake, you posted an invoice manually for this. You
cancel the invoice and the purchase order will automatically be
suggested by the system in the next ERS run.
If the document was posted automatically by ERS
If you cancel a document posted automatically, the item cannot be
invoiced using ERS a second time. You have to enter a second invoice
manually.
Example: In a purchase order for which ERS was defined the order price
was entered as 1.50 instead of 2.00. The invoice created automatically
for 100 pieces amounts to 150, based as it is on the wrong order price.
The supplier then complains. You then cancel the invoice and the
purchasing department corrects the price in the purchase order. Although
the goods receipt still has to be settled, the purchase order will not
appear on the list of orders to be settled in the next ERS run. The
invoice for 200 has to be entered manually.
You should therefore check whether you can post a subsequent debit for
the difference of 50 instead of cancelling the first invoice.

Error message extract from SAP system. Copyright SAP SE.