Used SESSIONS to remember player list

Our 4 players:

Erthainel, eune
Ruzgud, eune
TSM Bjergsen, na
Shaterane, eune

work perfectly. But when you try different players, like for example:

KiiroSama, EUNE
Kiorima, EUNE

we get errors about inserting into unexisting column. What's the
problem? :bug: