Problems when playing in multiplayer.

Hello, could you please tell me how to set up player teams on a map created by the generator so that it can be played in multiplayer?
When I create a random map in the editor and then set up teams, for example, 2 vs. 2, I get an error when saving: "As you've changed this map, rmg marker will be lost and multiplayer regeneration won't work," and the map, of course, doesn't work.
How can I play a random map in multiplayer with teams?