Earliest possible delivery date is &

What causes this issue?

According to the purchase order, the earliest possible goods receipt
for this item is the &V1&.

System Response

Depending on how the system is configured, this can either be a warning
message or an error messsage.

How to fix this error?

Contact Purchasing and check whether you should accept the delivery.
If the message is an error message, you can only post the goods receipt
into GR blocked stock.

Error message extract from SAP system. Copyright SAP SE.