Do you know if you experienced transaction ID wraparound as the message suggests?
Are there any other questionable messages in the log?
What do you get for the following queries: SELECT txid_current();
SELECT datname, datfrozenxid FROM pg_database;
SELECT current_setting('autovacuum_freeze_max_age'), current_setting('vacuum_freeze_min_age'), current_setting('vacuum_freeze_table_age');
pgsql-admin by date:
Соглашаюсь с условиями обработки персональных данных