Enter goods receipts for vendor & only

What causes this issue?

The <GL:vendor>vendor</> of the first <GL:purchase_order>purchase order
</> is &V1&.
All other purchase orders against which you wish to enter the goods
receipt must also have vendor &V1&.
If the order is a stock transport order, the issuing plant is specified
as the vendor.
For external service orders this message concerns the acceptance
posting.

How to fix this error?

You must enter goods receipts for purchase orders sent to different
vendors separately for each vendor.
IF &[SWITCH]S4H_DOCU_ON_PREMISE& = 'X'.
You can set the message type (error, warning, info) in Customizing:
<DS:TRAN.OMCQ>Choose function</>
ENDIF.

Error message extract from SAP system. Copyright SAP SE.