Change # id without Nitro(Bug)

Some people was talking about a bug, if you do this bug you can change your discord # Id without Nitro, i wanted to test it and it worked, so there is a bot called "UnbelievaBoat" , it has command "!discrim" when you type that command bot finds nicks of people with same id you have, then you have to change nickname to random guy from that list,if you do this you getting name you typed and new id, i think i know why this happens, because 2 people with same nick and id cant exist at one time, and id changes
I had 4008 id, now i have 0622 , and i want my 4008 id back because it was good

Some proofs:

My id before

My id after

and command that founds people with same id

(please give me my 4008 back xd)