[Icecast] log file message I don't understand

[Per Gunnarsson]

Hello!

I get something in my log files.
[2019-12-13  16:17:35] EROR admin/admin_handle_request Error parsing
command string or unrecognised command: !POKE
[2019-12-13  16:17:35] INFO admin/admin_handle_request Bad or missing
password on mount modification admin request (command: metadata)
[2019-12-13  16:17:35] WARN admin/admin_handle_request Admin command
metadata on non-existent source /feting

Where does !POKE come from?

regards,

Per Gunnarsson