Problems with missing OIDs

Hi,

after a disk-crash some weeks ago and a successful recovery, I now
find some strange issues in postgres.
I am not sure they are related to the crash, but I figure chances
are ...

One of them is: When trying to vacuum one database I get the following
message:
"ERROR:  could not open relation with OID 36893600"
After browsing the archives I found similar threads and possible
recovery methods.

So, I already reindexed and vacuumed all pg_catalog, with no effect.

Now I searched and found a row in pg_index with

indexrelid => 36893600

Is it save to just drop this row? Or how do I find out which index is
affected?

Any help is very much apprechiated as this seems to affect our backup-
dumping as well!

Best regards,

Alex
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