Field-dependence type 'I' for field & of object & is not allowed.

What causes this issue?

&V1& was specified as field name in a field relationship of type 'I'
for the object &V2&, but the field &V1& is not flagged as a subset
field in the Data Dictionary.

System Response

The View cluster was not activated.

How to fix this error?

The field relationship type 'I' bequeathes a root object subset field
selection condition which was specified when the View cluster was
called to another View cluster object which is not directly dependent
on this root object.
Specify the field which is flagged as subset from &V2& which is to copy
the initial subset restriction from the predecessor root object as
field name
Example:
A view cluster has two root objects (VIEW1 and VIEW2) which both have
the company code as subset field. The company code Popup should only be
processed once in this case.
A field relationship of type 'I' is specified in the company code field
dependency for VIEW2, VIEW1 is entered as predecessor, and the
predecessor field is the VIEW1 company code field name.

Error message extract from SAP system. Copyright SAP SE.