Ok, I like to gamble. Dave, I respectfully disagree.

If you...

ANALYZE TABLE HANKY.YO_MOMMA LIST CHAINED ROWS;

CREATE TABLE CHAIN_TEMP as
SELECT * from HANKY.YO_MOMMA
WHERE rowid in (SELECT head_rowid from CHAINED_ROWS
WHERE table_name = 'YO_MOMMA);

SELECT COUNT(*) FROM CHAIN_TEMP;

DELETE from HANKY.YO_MOMMA
WHERE rowid in (SELECT head_rowid from CHAINED_ROWS
WHERE table_name = 'YO_MOMMA);

INSERT into HANKY.YO_MOMMA
SELECT * from CHAIN_TEMP;

DROP table CHAIN_TEMP;

DELETE from CHAINED_ROWS
WHERE table_name = 'YO_MOMMA;

You will eliminate chained rows in this table.

Yes no?
Or did you mix up chained and migrated?

MH