except psycopg2.ProgrammingError, msg:
self.db.rollback()
raise DBUpdateError, "Unable to apply knownchanges update 18, rollback issued. Error message : %s" % (str(msg))
except psycopg2.ProgrammingError, msg:
self.db.rollback()
raise DBUpdateError, "Unable to apply knownchanges update 18, rollback issued. Error message : %s" % (str(msg))