Quest added level instead of being removed

[avertuss 58]

Hi, I have a problem with the quest. It is to act as a blockade of experience, but instead of removing conquered exp adds a whole level. My quest:

quest block5 begin
    state start begin
        when kill with not npc.is_pc() and pc.get_map_index() == 73 and pc.get_level() >= 95 begin
            local experience = pc.get_exp() - pc.getqf("exp5")
            pc.give_exp2(-experience)
             --chat("QF: "..pc.getqf("exp5"))
            -- chat("Should remove: "..experience)
            chat("Big level! ")
        end
        
        when login with pc.get_map_index() == 73 and pc.get_level() >= 95 begin
            pc.setqf("exp5", pc.get_exp())
            -- chat("Set qf: "..pc.getqf("exp5"))
            chat("Big level! ")
        end
        when logout or disconnect begin
             pc.delqf("exp5")
        end
    end
end