I got invited to play but my key is duplicated

Other The Library
1

I got invited like 10 hours go and it says my key is duplicated, what do I do?

2

Check your messages on Halo Waypoint, you should have received a new steam key to help with this. Unfortunately, I don’t know if that will solve the problem, as neither of the steam keys I received have worked.

3

Ty just checked got a new key it worked for me

4

Glad you got your new key OP!