There is no nickname in the game
Help please, for some reason, instead of my nickname, I have numbers that change after each battle in PvP (for example, it was 259 was 301), etc.
and if possible please change to Ovsynikov
I'm sorry to hear you've run into some issues with the name of your character.
We advise emailing firstname.lastname@example.org for additional assistance. Please be sure to include as much detail as possible including your Steam-ID, World Region, your game logs.
Where to find Steam logs: C:\Program Files (x86)\Steam\logs\cloud_log.txt
(Note: If you've saved any of the above to a different drive, you'll need to use that drive letter. C: is the most common, so it's what we've included here.)
Once we have this information we can begin to dig into your issue.
Thank you so much for your patience and support.