Enter only stock type 1 or 2 for special stock &

What causes this issue?

In conjunction with special stock indicator &V1&, only the following
stock types are possible:
<LB>1</> <DS:GLOS.unrestricted-use_stock>unrestricted-use stock</>
<LB>2</> <DS:GLOS.stock_in_quality_inspection>stock in quality
inspection</>

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?

Error message extract from SAP system. Copyright SAP SE.