Does Not Exists / Exists In Database are switched up!

Hey guys, so I have been trying to deal with this for a while now, but it’s getting quite confusing, or it’s meant to be like that but I don’t really quite get the logic behind it!

if I set my server side validation to “Does Not Exist in Database”, it acts and behaves like if the value actually exist in the database, and if I select “Exists In Database” it behaves like I would check if the value wouldn’t exist.

Is this behavior expected?