My steamid disappeared?

It's been a while since my steamid turned to VALVE_ID_LAN on public servers and to STEAM_ID_LAN on my own LAN server. So I don't know why is this caused and dunno how to fix it :/ It's important because otherwise my demos won't get accepted on communities and many other disadvantages.

Help please.

p.s: If necessary i'll add screenshots.

nope, people can join me and see that I have no steamid :(