If the records in the portal are repeating same information, it points to the wrong fields in the portal or wrong table occurrence for the portal.
So your relationship should be:
Policies::PolicyID = Claims::PolicyID
Be sure the portal is based upon Claims and check the fields within the portal and make sure they all are based upon the Claims table occurrence as well.
That is the relationship I have, from Policy table to Claims table, hence my confusion why there is an error.