Deletion of Sebastian Plewinski

Comment: per above. Also, the username of author {{user1|Management artists}}, the nature of the article, and repeated removal of the AfD template by Polish-registered IPs with no other edits, suggest a promotional agenda and a possible |COI. That's not itself reason for deletion, but it causes one to look extra hard at the evidence for notability, and I don't think this reaches the standard required by #Criteria for musicians and ensembles
Stance: delete
Cited policy: Wikipedia:Conflict of interest (WP:COI||WP:MUSIC)