Pomoże ktoś ze skryptem? Anty Fly

[13:12:45 ERROR]: [Skript] Can't understand this condition/effect: remove fly for loop-player (antyfly.sk, line 26: remove fly for loop-player')

options:
    time: 20 #Czas po jakim ma zniknac walka
on damage:
    attacker is player
    victim is player
    set {walka.now.%victim%} to {@time}
    set {walka.now.%attacker%} to {@time}
    if {walka.now.%victim%.bc} is not set:
        set {walka.now.%victim%.bc} to true
        send "&cJestes w walce, nie wylogowywuj sie!" to victim
    if {walka.now.%attacker%.bc} is not set:
        set {walka.now.%attacker%.bc} to true
        send "&cJestes w walce, nie wylogowywuj sie!" to attacker
on command:
    if {walka.now.%player%} is set:
        if command is not "msg" or "r" or "t" or "...":
            cancel event
            send "&7Nie mozesz uzywac komend podczas walki"
            stop
every 1 second:
    loop all players:
        if {walka.now.%loop-player%} is larger than 0:
            if loop-player's gamemode is creative:
                set loop-player's gamemode to survival
            if loop-player is flying:
            remove fly for loop-player
            remove 1 from {walka.now.%loop-player%}
        if {walka.now.%loop-player%} is 0:
            send "&aNie jestes juz w walce, mozesz spokojnie sie wylogowac" to loop-player
            clear {walka.now.%loop-player%}
            clear {walka.now.%loop-player%.bc}
on quit:
    if {walka.now.%player%} is set:
        kill player
        #execute console command "tempban %player% 5m"
        broadcast "&6Gracz &c%player% &6wylogowal sie podczas walki!"