It appears Postgres allows to create sequences that are shared between tables. This may be a fringe use case but I just met it: the necessity to share a qequence between two tables so that we can't have a record with the same primary key between these two tables. Right now, AFAIK, Django generates a new sequence for each AutoField or BigAutoField. It would be nice to add a NamedSequenceAutoField that allows to name the sequence to use and share it between tables.