Storage location could not be determined uniquely

What causes this issue?

Warehouse number &v2& has been assigned several storage locations
in plant &v1&.
None of these storage locations has been defined as the standard storage
location.

System Response

Correct the data so that either the plant/warehouse number is assigned
only one storage location or so that one storage location is defined as
the standard storage location. You make this assignment in the
Customizing activity
<DS:SIMG.SIMG_SAPCOML2>Assign Warehouse Number to Plant/Storage
Location</> (Business Structure -> Assignment -> Logistics Execution).

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.