Hello, Anton Khorev

6UP seems to be the same person as “aquila2” you mentioned last year. This user and his edits are surprisingly similar. "aqulia2" may currently be using several accounts to evade blocking.
https://www.openstreetmap.org/user_blocks/6456

Also, there's something "strange" about 6UP's edits.
So I recently sent him a message asking him to check this changeset, but he hasn't responded at all.

In any case, 6UP ignores our message and continues mapping. Unfortunately, it is impossible for us to contact him.