Kovacs Zoltan <kovacsz(at)pc10(dot)radnoti-szeged(dot)sulinet(dot)hu> writes:
>> Is it possible that 1060 and 1092 have the same usesysid in pg_shadow?
> Hmmm. That was the problem. Thanks! By the way, could you please define a
> unique constraint on column 'usesysid' in future in PostgreSQL?
Yup, there should be one (and one on usename, too). Not sure why it's
been overlooked so far.
regards, tom lane