Valuation type & for material & was delivered by vendor &

What causes this issue?

The valuation type &V1& for material &V2& was already delivered in the
last posting from vendor &V3&, according to the batch master record.
However, a different vendor was entered in the purchase order.

System Response

Depending on your system settings, this message is a warning or an
error message.

How to fix this error?

Clarify which vendor should deliver the valuation type.
If the message is an error message:
The vendor for the valuation type must be the same as the vendor in the
purchase order.
If the vendor in the purchase order should actually deliver valuation
&V1&, you can post the goods receipt as follows: Cancel processing,
change the vendor in the batch master record, and enter the goods
receipt again.
If the vendor should deliver to a different valuation type, you should
change the purchase order. Contact Purchasing.
If this message is a warning message:
If you post the item despite the warning, the system overwrites the
vendor in the batch master record with the new vendor.

Error message extract from SAP system. Copyright SAP SE.