Question S9--Messenger- App-Settings :3202 categories Deleted??!

[Ms.Turner18]

Galaxy S9+

( Fb )Messenger version 222.0.0.15.124
App Settings
Under More Settings
It literally says 3202 categories deleted.
Can anyone help me understand why this is showing up?
This isn't the only app that has said that there are deleted catehories...

 

[helpstar]

What exactly is the problem with these deleted "categories"?

 

[webworkings]

I was wondering the same thing.