[Bacardi]

You could show list SM plugins.
rcon sm plugins list




But try this way if help, using rcon.
- Need unload temporary Sourcemod so we can rename this one file.
rcon meta unload sourcemod

- Then you go and rename file from server (FTP ?) ...addons/sourcemod/data/sqlite/clientprefs-sqlite.sq3
to example old_clientprefs-sqlite.sq3

- After this changemap to load SourceMod back
rcon changelevel map_name
Plugin create automatically new clientprefs-sqlite.sq3 file.
(Depend are you running clientprefs.smx)