You need to use your column names.
I don't know your table structures. You need to get the column names from gtemp_bsc_programassignment and CDR_PROGRAMASSIGNMENT_CONV and insert them explicitly into the insert statement:
INSERT INTO cdrload.gtemp_bsc_programassignment(----INSERT YOUR COLUN NAMES HERE-----)
SELECT (----INSERT YOUR COLUN NAMES HERE-----) FROM IngersollRand.CDR_PROGRAMASSIGNMENT_CONV@INGEST;