I get this strange error
Caused by: org.postgresql.util.PSQLException: ERROR: could not open
relation base/17369/1684: No such file or directory
You lost file related to table 1684 and database 17369. Check presence file with name 1684 in directory base/17369.
You can determine which table it is:
1) get database name:
select * from pg_database where oid=17369
2) get table name (connect to affected database):
select * from pg_class where oid=1684
Probably there is not much more you can do. Only restore from backup.