Hello,
We have postgresql servers with PostgreSQL 13.10 on Ubuntu release 22.04.
The issue is a unique key constraint with two columns one is character
another is integer. At some point the unique key did not work as I see
duplicate values with these two columns combination and it happened on
multiple servers on multiple databases on same table with same unique key.
I tried db dump and restore but the key is failing to create when restore
with duplicate value errors.