For item & of purch. order &, no goods issue can be posted

What causes this issue?

Goods issue is not possible for item &V1& of purchase order &V2&. The
possible reasons for this are as follows:
Item &V1& is not a stock transfer item.
The entered plant does not match the plant in the item.
Goods issues for this purchase order must be posted via a delivery
document.

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?

INCLUDE NA_EINGABE_PRUEFEN
Check whether the purchase order is a stock transport order.
IF SCREEN = 'SCREEN'
<DS:TRAN.ME23N>Perform Function</>
ENDIF
You can remove the item, so that the system proposes all the items of
this purchase order in the selection list. Then select the item(s) that
you require in the selection list.
Enter a different plant, if appropriate.
Create a delivery document in the shipping system.

Error message extract from SAP system. Copyright SAP SE.