bot doesnt unequip items

[MrFiend179]

async function unequipItem (destination) {
  try {
    await bot.unequip(destination)
    bot.chat('unequipped')
  } catch (err) {
    bot.chat(`cannot unequip: ${err.message}`)
  }
}

so i pass in parameter as 4 considering it as helmet, the bot is wearing a helmet but when i do

if(message === 'uacttm0'){
        unequipItem(4)
}

this shows invalid destination 4
but when i do it with 5 considering whole inventory it also gives me same error

[1ProCrafters]

try 0?