Error in Subobject Definition for &1

What causes this issue?

Message is raised because subobejct SOBJ field definition in is
incorrect.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please recheck subobject field definition.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.