Ban in Synergy by Steamid2 is not supported

[yarik2720]

What are the steps to reproduce this issue?

1. Run server on Synergy (appid 17520) version 25.3
2. Ban any player
3. Player reconnects to server after a while

What happens?

Banning on srcds session is not successful, Synergy sends error that SteamId2 is not supported

What were you expecting to happen?

Player banned after join

Any logs, error output, etc.?

06/18/2026 - 19:34:00: L 06/18/2026 - 19:34:00: "player<3041><[U:1:88197xxxx]><>" STEAM USERID validated 
06/18/2026 - 19:34:00: Synergy: STEAM_ format is not supported for this command. 
06/18/2026 - 19:34:00: L 06/18/2026 - 19:34:00: Banid: "<><UNKNOWN><>" was banned "for 5.00 minutes" by "Console" 
06/18/2026 - 19:34:00: L 06/18/2026 - 19:34:00: "player<3041><[U:1:88197xxxx]><>" disconnected (reason "You have been banned by this server, check <REMOVED> for more info")

Any other comments?

Add ability to switch steamid version for banning to steam64 or steam3.
Issue was also looked through on Sourcemod repository and basebans proceeds ban successfully: alliedmodders/sourcemod#2489

What versions of software are you using?

Operating System: Ubuntu Server 20.04 LTS ESR / Ubuntu Server 22.04 LTS
SourceBans++ Version: 1.8.0 | Git: 1428 / 1.6.4
SourceMod Version: 1.13.0.7234
MetaMod Version: 1.11.0-dev+1145V