How To Fix STGR106 - Plant &1 is already assigned to reference plant &2

SAP Error Message - Details

• Message type: E = Error

• Message class: STGR - Hold store grouping messages

• Message number: 106

• Message text: Plant &1 is already assigned to reference plant &2

What causes this issue?

Plant &V1& is already assigned to reference plant &V2&.

How to fix this error?

You can choose another plant; the help list will indicate you all
available plants.
Otherwhise, if you really want to use the plant you indicated, you
should first unassign the plant from its current reference plant and
after that you can make it new reference plant or you can use Reassign
button to change its reference plant.

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.