Map differs from the server's

So I’m developing a starwarsrp server. I went to connect today and on the loading screen I got this message: your map [maps/rp_venator_tbh.bsp] differs from the server’s I resolved the issue for myself but my friend says that he has the same problem. After doing some research I noticed that many had said it was a client-side issue but I am beginning to think that it is server-side. Some support would be greatly appreciated in resolving this matter.

Disable all of your workshop addons, and delete any instances of the map in /maps/ or /download/maps/