The property CONIND (pseudo-property ) was used briefly in the very early IEF/Gen releases, but has been obsolete for a long time. It can be deleted.
The SQL to find all "CONIND" Object properties in the Host Encyclopedia is:
SELECT * FROM DPRP WHERE PROP_TYPE_CODE = 57;
To delete the rows from DPRP:
DELETE FROM DPRP WHERE PROP_TYPE_CODE = 57;
Then Checkout model/subset or child model and upload it to CSE.