gistfile1.txt

# pg_upgrade -d 12 -D 13 -b /nix/store/d7dl2di3b3x9i9dlxwfd8sh0gjl2h89c-postgresql-and-plugins-12.4/bin
Performing Consistency Checks
-----------------------------
Checking cluster versions                                   ok
Checking database user is the install user                  ok
Checking database connection settings                       ok
Checking for prepared transactions                          ok
Checking for reg* data types in user tables                 fatal

Your installation contains one of the reg* data types in user tables.
These data types reference system OIDs that are not preserved by
pg_upgrade, so this cluster cannot currently be upgraded.  You can
remove the problem tables and restart the upgrade.  A list of the
problem columns is in the file:
    tables_using_reg.txt

Failure, exiting

# cat tables_using_reg.txt
In database: infra
  periods.system_versioning.func_as_of
  periods.system_versioning.func_between
  periods.system_versioning.func_between_symmetric
  periods.system_versioning.func_from_to
  periods.system_versioning_func_as_of_key.func_as_of
  periods.system_versioning_func_between_key.func_between
  periods.system_versioning_func_between_symmetric_key.func_between_symmetric
  periods.system_versioning_func_from_to_key.func_from_to