I can not invite my friend to my school

I create my school a week ago in Fall Challenge and profile.
but my friend cant search my school. So he just create a school with same name.
How can I fix it?

what’s your friend username on CodinGame? I can look into it.

School name is 42 Seoul. friends are ‘hycho’ and ‘eunhkim’. thx

you’re in the same team now