CategoryChildManager create method not working

const { Events, ChannelType } = require('discord.js');
const Game = require('../games/gameClass');
const GameCategory = require('../schemas/gameCategory');



let currentGame;
module.exports = {
    name: Events.VoiceStateUpdate,
    async execute(oldState, newState) {


        try {
            let currentChannel = newState.channel;

            if (currentChannel.full) {
                const gameCategoryId = await GameCategory.findOne({ guildId: newState.guild.id });
                const gameCategory = await newState.guild.channels.fetch(gameCategoryId.channelId);


                console.log('queue full');
                let players = [];

                for (let i = 0; i < newState.channel.members.size; i++) {
                    players.push(newState.channel.members.at(i).id);
                    console.log(i);
                }



                let gameId = Math.ceil(Math.random() * 10000);
                console.log(players);

              
                console.log(gameCategory.id);

                  // This actually returns the ID of the category, so the category channel is being found.
                /* 

                I am using the .create() method of the category channel. I'm pretty sure the syntax is correct because if I do
                newState.guild.channels.create()
                with the same syntax, it works.

                However, when I try to make a child channel inside of the category, it does not work. 
                Can somebody please help me :)
                
                
                */
  

                await gameCategory.create({
                    name: `Game-${gameId}`,
                    type: ChannelType.GuildText
                });

            }

        } catch (err) {

        }



    },
}

 

const { Events, ChannelType } = require('discord.js');
const Game = require('../games/gameClass');
const GameCategory = require('../schemas/gameCategory');



let currentGame;
module.exports = {
    name: Events.VoiceStateUpdate,
    async execute(oldState, newState) {


        try {
            let currentChannel = newState.channel;

            if (currentChannel.full) {
                const gameCategoryId = await GameCategory.findOne({ guildId: newState.guild.id });
                const gameCategory = await newState.guild.channels.fetch(gameCategoryId.channelId);


                console.log('queue full');
                let players = [];

                for (let i = 0; i < newState.channel.members.size; i++) {
                    players.push(newState.channel.members.at(i).id);
                    console.log(i);
                }



                let gameId = Math.ceil(Math.random() * 10000);
                console.log(players);

              
                console.log(gameCategory.id);

                  // This actually returns the ID of the category, so the category channel is being found.
                /* 

                I am using the .create() method of the category channel. I'm pretty sure the syntax is correct because if I do
                newState.guild.channels.create()
                with the same syntax, it works.

                However, when I try to make a child channel inside of the category, it does not work. 
                Can somebody please help me :)
                
                
                */
  

                await gameCategory.create({
                    name: `Game-${gameId}`,
                    type: ChannelType.GuildText
                });

            }

        } catch (err) {

        }



    },
}