SAP Message /ISDFPS/MM189 - Storage location &1 is the partner storage location of stor. loc. &2

Diagnosis
Storage location &V1& is the partner storage location of storagelocation &V2&.
This means that storage location &V1& cannot be defined as an HUstorage location.

Procedure
For storage location &V1&, delete the HU requirement indicator andthe partner storage location that has already been entered.