Database backup generates a general error with PostgreSQL 12+

SQL ERROR [ postgres ]

ERROR: column "consrc" does not exist LINE 1: SELECT conname as index_name, consrc ^ HINT: Perhaps you meant to reference the column "pg_constraint.conkey" or the column "pg_constraint.conbin". []

SQL

SELECT conname as index_name, consrc FROM pg_constraint, pg_class bc WHERE conrelid = bc.oid AND bc.relname = 'phpbb_topics_watch' AND NOT EXISTS ( SELECT * FROM pg_constraint as c, pg_inherits as i WHERE i.inhrelid = pg_constraint.conrelid AND c.conname = pg_constraint.conname AND c.consrc = pg_constraint.consrc AND c.conrelid = i.inhparent )

BACKTRACE

FILE: (not given by php)

LINE: (not given by php)

CALL: msg_handler()

FILE: [ROOT]/phpbb/db/driver/driver.php

LINE: 1023

CALL: trigger_error()

FILE: [ROOT]/phpbb/db/driver/postgres.php

LINE: 193

CALL: phpbb\db\driver\driver->sql_error()

FILE: [ROOT]/phpbb/db/extractor/postgres_extractor.php

LINE: 223

CALL: phpbb\db\driver\postgres->sql_query()

FILE: [ROOT]/includes/acp/acp_database.php

LINE: 104

CALL: phpbb\db\extractor\postgres_extractor->write_table()

FILE: [ROOT]/includes/functions_module.php

LINE: 676

CALL: acp_database->main()

FILE: [ROOT]/adm/index.php

LINE: 81

CALL: p_master->load_active()