Party entitled to dispose &1 is not allowed for product &2

What causes this issue?

Party entitled to dispose &v1& is not valid for product &v2& because the
warehouse product master data is not maintained for this specific party
entitled to dispose.

System Response

The system prevents you from posting the results of the physical
inventory count.

How to fix this error?

If the counter entered an incorrect party entitled to dispose, you can
change the count directly or you can trigger a recount.
If the count data is correct, maintain the warehouse product for product
&v2& and party entitled to dispose &v1& on the <LS>SAP Easy Access</>
screen under <LS>Extended Warehouse Management</> > <LS>Master Data</> >
<LS>Product</> > <LS>Maintain Warehouse Product</>.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.