Error: Corrupted index cache file and Error: Maildir filename has wrong S value

Good day Guys

I have been met with a very interesting set of error messages.

Here is the snippet(s) https://pastebin.com/raw/nFf79Ebc

(Sorry for all the redacted REMOVED_*.)

Google is proving to be a bit challenging in helping and explaining.

Could anyone please share how something like this happens, but more importantly how to recover from this. doveadm index -u <username> INBOX do the trick?

I also would like to ask the community, is there any tips or tricks any of you guys do to mitigate index / cache corruptions.

Many thanks Regards Brent Clark