Supplying plant &1 and storage location &2 are already assigned

What causes this issue?

Supplying plant &V1& and storage location for CD stock &V2& are already
assigned to receiving cross-docking plant &V3&. The new entry, which
belongs to the same supplying plant and storage location but is assigned
to a different receiving CD warehouse &V4&, may not make sense because,
in general, different warehouse numbers are linked to different
receiving CD plants. However, the combination of supplying plant and
storage location for CD stock can only be assigned to one warehouse
number in the <DS:SIMG.SIMG_SAPCOML2>Implementation Guide</>.

System Response

The system issues a warning message because the new entry may not make
sense.

How to fix this error?

Check the consistency of your configuration. If the same warehouse
number is assigned to the receiving cross-docking plants &V3& and &V4&
you can continue with the present settings and ignore this warning.

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.