Too many indices for index buffer. Tell a Programmer (44232>32768) (in my server)

Hello, (sorry for grammar i’m italian).
I have got a TTT server.
Recently i had an error:
Almost all the people online in my server receive the following error: Too many indices for index buffer. Tell a Programmer (44232>32768).
How to fix?
Thanks;
ServerLog: Result: innocent win.
Dropped ricardo-benvenuto from server (ricardo-benvenuto timed out)
Dropped Alessio1707[ITA] from server (Alessio1707[ITA] timed out)
Dropped The italian way from server (The italian way timed out)
Dropped nickduffy2003(ITA) from server (nickduffy2003(ITA) timed out)
Dropped [ITA]maxaxe321 from server ([ITA]maxaxe321 timed out)
Dropped [o.W.n] Gabdj99 ITA from server (Disconnect by user.)
Dropped XTore from server (XTore timed out)
Client “ricardo-benvenuto” connected (79.33.61.220:64492).
Dropped [J4F] Predator from server ([J4F] Predator timed out)
Client “[ITA]maxaxe321” connected (93.70.207.88:27005).
Client “Scorpionbay 96” connected (95.238.137.249:27005).
Dropped Joseph 27# from server (Joseph 27# timed out)

any addons or custom models? Usually when someone causes a decal (blood, bullet holes) to be drawn on a weird model (too high poly, for instance) this happens

In my server there are many addons.
Look here, please:

Don’t throw bug bait at cars.