Releasing an update for a map with same filename?

[totakeke]

If I released a map named ctf_blah.bsp

and then wanted to release an updated map,

is it an absolute requirement that the filename be changed to something like... ctf_blah_v2.bsp?

Or, can I keep the filename the same (ctf_blah.bsp) and will Source dedicated servers automatically force clients to download the updated version (if a different version of the map is detected through checksums?? Honestly I don't have a clue how Source servers work in this area, please enlighten me)

[_ACID_]

The servers check if the version you have is different, but they'll disconnect you if it is. To make sure people don't have to delete the old version from their folders themselves, rename the map.

[ICantShoot]

Never release maps with same filename.