PostgreSQL 13 on Windows – “invalid page in block 0 of relation pg_index” – How to recover?

I'm facing a serious issue with my PostgreSQL 13 instance on Windows. I'm unable to open a database in pgAdmin and receive the following error: ERROR: **invalid page in block 0 of relation base/16394/2610** After investigation, I found that this OID (2610) corresponds to the critical system catalog **pg_index**. From what I understand, this catalog is essential for managing all indexes, so corruption here is catastrophic. My Setup PostgreSQL Version: 13 OS: Windows 10 Symptoms pgAdmin fails to open the database psql throws an error or hangs when trying to list relations Any attempt to REINDEX crashes due to pg_index corruption Running pg_dump on the entire database fails early What I've Tried Identified the corrupted relation using oid2name Confirmed the corrupted catalog is pg_index Considered rebuilding DB from scratch using salvaged schema and table data I'd like to know: Is there any safe way to reconstruct or replace pg_index? Can I recover more data using pg_dirtyread or other low-level tools? Should I avoid trying REINDEX SYSTEM given that pg_index is corrupted? Any known method to surgically patch or recreate system catalogs? I do not have a recent physical or logical backup (lesson learned 😔), so any suggestions to extract usable data or rebuild the DB from working fragments would be hugely appreciated. Thanks so much for any guidance you can provide.