问未处理的Promise Rejection警告DiscordApiError:未知通道

EN

client.on('voiceStateUpdate', (oldMember, newMember) => {
        let isLeave = (oldMember.channel != undefined)

        if (isLeave) {
            console.log(isLeave);
            if (oldMember.channel.name.startsWith('- ')) {
                if (oldMember.channel.members.size == 0) {
                    oldMember.channel.delete()
                }
                else { 
                    let matchMember = oldMember.channel.members.find(x => `${x.displayName}` == oldMember.channel.name);
                    if (matchMember == null) {
                        oldMember.channel.setName(`- ${oldMember.channel.members.random().displayName}'s Room`)
                    }
                }
            }
        }

        if (newMember.channel != null && newMember.channel.name.startsWith('+ ')) {
            newMember.guild.channels.create(`- ${newMember.member.user.username}'s Room`, {
                type: "voice",
                parent: '809723111477346304',
            }).then(cloneChannel => newMember.setChannel(cloneChannel))
        }
    });