I am using version Jan2022-SP2, and after a server restart I had the BBPcheckbats error.

I upgraded to the latest version Jan2022-SP4 as it has the fix for this reported bug, and I am still unable to start the database.

After manually editing the BBP.dir file and removing the entries on which the database failed to load with messages similar to (BBPcheckbats         file /bat/01/67/16774.tail1 too small (expected 143640, actual 0), I managed to make the database start and connect to it and query the tables successfully.

Is this the right way to recover from this? what I am risking losing by deleting these entries, should I have corrupted tables that are affected by these entries? 

What is exactly the role of BBP.dir? any documentation describing the use of this file.

Appreciate your help.

Thank you.