Foreign key does not exist in include and will be deleted

What causes this issue?

You created a foreign key for a field in an include, but set the
'Inherited from include' flag. The system tries to copy the definition
of the foregin key from the include, but the foreign key is not defined
in the include.

System Response

The foreign key was deleted.

How to fix this error?

You may not set the 'Inherited from include' flag when creating the
foreign key for this field.

Error message extract from SAP system. Copyright SAP SE.