Steamworks multiplayer problem

Hello, Im creating a game with unity and i tried to link the multiplayer via stream using steamwork and mirror. I tried to see if its working and unfortunately it doesnt recognise the same game for both players. For example, if i add the game exe to my steam collection and a friend do the same, and i invite him, he gets a invitation for a game called spacewars. The game works fine when open via stream, or by the exe but never with the invite. I have set the appid to 480 but i dont think thats the problem since the tutorial i followed left it at 480 as well. Thanks in advance

 

AppID 480 belongs to Spacewars, you'll need to set the AppID to your game's so that your friend doesn't get a invitation for Spacewars

 

Should i change it to something completly random or anything but 480?

 

You should change it to the app id of your Steam game.