На мой сервер зашёл игрок под именем _Wels, и начал ломать его. Как думаете, что это может быть?

[21:24:04] [Server thread/INFO]: _Wels[/138.124.114.146:39222] logged in with entity id 276366 at (72.50027547459246, 71.0, -24.47156269887744)
[21:24:04] [Server thread/INFO]: _Wels joined the game
[21:24:21] [Server thread/INFO]: [_Wels: Made Dagakar no longer a server operator]
[21:24:23] [Server thread/INFO]: [_Wels: Made K1sta4ka no longer a server operator]
[21:24:25] [Server thread/INFO]: [_Wels: Made NightHvnter183M no longer a server operator]
[21:24:28] [Server thread/INFO]: [_Wels: Set own game mode to Creative Mode]
[21:24:29] [Server thread/INFO]: [_Wels: Teleported _Wels to S_H_I_S_H]
[21:24:32] [Server thread/INFO]: Banned _Wels: Banned by an operator.
[21:24:38] [Server thread/INFO]: _Wels lost connection: You are banned from this server
[21:24:38] [Server thread/INFO]: _Wels left the game
[21:24:49] [Server thread/INFO]: Dagakar[**********] logged in with entity id 276665 at (-286.56577532113914, 1.0, 30.628520225343987)
[21:24:49] [Server thread/INFO]: RTX3090TI Dagakar joined the game
[21:24:54] [Server thread/INFO]: Disconnecting com.mojang.authlib.GameProfile@1dd5e204[id=f39a1d3b-ee47-3ea7-b356-1b27046cda93,name=_Wels,properties={},legacy=false] (/138.124.114.146:51716): You are banned from this server.
Reason: Banned by an operator.
[21:24:54] [Server thread/INFO]: com.mojang.authlib.GameProfile@1dd5e204[id=f39a1d3b-ee47-3ea7-b356-1b27046cda93,name=_Wels,properties={},legacy=false] (/138.124.114.146:51716) lost connection: You are banned from this server.
Reason: Banned by an operator.
[21:24:54] [Server thread/WARN]: handleDisconnection() called twice
[21:24:54] [Server thread/INFO]: [Not Secure] <S_H_I_S_H> р ёїє ыш юэ ЄяїрхЄё ?
[21:25:03] [Server thread/INFO]: Dagakar lost connection: You logged in from another location
[21:25:03] [Server thread/INFO]: RTX3090TI Dagakar left the game
[21:25:03] [Server thread/INFO]: Dagakar[/138.124.114.146:51726] logged in with entity id 276801 at (-286.56577532113914, 1.0, 30.628520225343987)
[21:25:03] [Server thread/INFO]: RTX3090TI Dagakar joined the game
[21:25:17] [Server thread/INFO]: RTX3090TI Dagakar fell out of the world
[21:25:28] [Server thread/INFO]: Dagakar lost connection: You logged in from another location
[21:25:28] [Server thread/INFO]: RTX3090TI Dagakar left the game
[21:25:28] [Server thread/INFO]: Dagakar[*********] logged in with entity id 277281 at (-10545.5, 310.0, -428.5)
[21:25:28] [Server thread/INFO]: RTX3090TI Dagakar joined the game
Особого вреда он не сделал, но из-за него человек потерял все вещи, поэтому решил сделать этот пост