Quest problem

Hello, I have this quest, which gives level 249 at the creation of the character.

The problem is that after 1 or 2 hours, or maybe after a reboot, some players get level 1, with no points at status, or with reseted skills.

Why?

Code:

quest lvl_125 begin
        state start begin
        when login with pc.get_level() <= 249 begin
        local lvl = 250
        if pc.get_level() <= 250 then
        while pc.get_level() < lvl do
        pc.give_exp2(pc.get_next_exp())
        end
        end
        end
        end
        end