Goods recipient & has no unloading points assigned to it

What causes this issue?

The maintenance of the unloading point for the receiving point is
linked to the unloading points defined in the customer master record
of the goods recipient.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

&WHAT_TO_DO& customer master record which is assigned to the
plant. Maintain the unloading points with <ds:TRAN.XD02>Change
customer ( head office) </>.

Error message extract from SAP system. Copyright SAP SE.