SkBee duration of potion effect change

[Rijen147]

hi, i was trying to change duration of potion effect via skbee, but it gives a error

code:

on potion effect added:
    if "%event-potioneffecttype%" = "night vision":
        if potion duration of event-potioneffect converted to minutes is greater than 5:
            set potion duration of event-potioneffect to 5 minutes