Removing objects added with event detection is not an effective way of solving your issue. You have to fix the root of the problem which is an exploiter being able to insert objects server-wide probably due to a backdoor or vulnerability. If your game has free models (scripts and physical stuff), try searching through those. If it contains keywords like require, getfenv, setfenv or weird strings like this 12\89\67\46 then you should get rid of that segment of code and any references to it.
If you find nothing or have no free models, try checking your plugins using plugin scanners like Kronos.
Otherwise, you may have a faulty client<->server comm.