Shipping point & is referenced in shipping point determination

What causes this issue?

The selected shipping point still has an entry in the shipping
condition, loading group, or plant assignment to shipping point for
shipping point determination.

System Response

The system cannot delete the assignment between shipping point and
plant.

How to fix this error?

If you want to delete the assignment between plant and shipping point,
you must first cancel the shipping point assignment in
<DS:SIMG.SIMG_CMMENUOLSDOVL2>Customizing</>.

Error message extract from SAP system. Copyright SAP SE.