Michel Pelletier <pelletier.michel@xxxxxxxxx> writes: > On a 12.3 AWS RDS instance, I get the following error when trying to drop > either of two tables: > dev=> drop table current_flight; > ERROR: invalid non-zero objectSubId for object class 297108 > dev=> drop table flight; > ERROR: invalid non-zero objectSubId for object class 297108 This looks like corrupt data in pg_depend, specifically an entry or entries with classid or refclassid = 297108, which should not happen (the classid should always be the OID of one of a short list of system catalogs). You could try poking around in pg_depend to see if you can identify any obviously-bogus rows. No idea how it got that way. Have you had any database crashes or the like? regards, tom lane