Modal submit, 2d time, crashes app

const { SlashCommandBuilder, ActionRowBuilder, Events, ModalBuilder, TextInputBuilder, TextInputStyle, InteractionType } = require('discord.js');
const db = require('../../models');
const Customer = db.customer;
const config = require('../../Configs/config.js');

module.exports = {
    data: {
        name: "register",
        description: "Register as a customer or supplier.",
        dm_permissions: "0",
    },
    async execute(interaction, client) {
            const modal = new ModalBuilder()
                .setCustomId('registerModal')
                .setTitle('Register as a Customer & Supplier!');

            const characterName = new TextInputBuilder()
                .setCustomId('characterName')
                .setLabel("What's your in-game character name?")
                .setPlaceholder('Enter in-game character name')
                .setStyle(TextInputStyle.Short);

            const guildName = new TextInputBuilder()
                .setCustomId('guildName')
                .setLabel("What's your in-game guild name?")
                .setPlaceholder('Enter in-game guild name')
                .setStyle(TextInputStyle.Short);

            const customerType = new TextInputBuilder()
                .setCustomId('customerType')
                .setLabel("What role do you wish to fulfill?")
                .setPlaceholder('Supplier / Buyer / Both')
                .setStyle(TextInputStyle.Short)
                .setRequired(true);

            const comment = new TextInputBuilder()
                .setCustomId('comment')
                .setLabel("Do you want to add something else?")
                .setStyle(TextInputStyle.Paragraph)
                .setRequired(false);

            const characterActionRow = new ActionRowBuilder().addComponents(characterName);
            const guildActionRow = new ActionRowBuilder().addComponents(guildName);
            const customerActionRow = new ActionRowBuilder().addComponents(customerType);
            const commentActionRow = new ActionRowBuilder().addComponents(comment);

            modal.addComponents(characterActionRow, guildActionRow, customerActionRow, commentActionRow);

            await interaction.showModal(modal)
            client.on(Events.InteractionCreate, async (interaction) => {
                if (!interaction.isModalSubmit()) return;
                if (interaction.customId === 'registerModal') {
                    const guild = await interaction.client.guilds.fetch(config.GUILD_ID);
                    const channel = await guild.channels.fetch(config[`REGISTER_FEED`]);
                    const customer = await Customer.findOne({ where: { discordId: interaction.user.id } });
            
                    if (!customer) {
                        await Customer.create({
                            discordName: interaction.user.tag,
                            discordId: interaction.user.id,
                            gameName: interaction.fields.getTextInputValue('characterName'),
                            gameGuild: interaction.fields.getTextInputValue('guildName'),
                            userType: interaction.fields.getTextInputValue('customerType'),
                            comment: interaction.fields.getTextInputValue('comment'),
                        });
                        await interaction.reply({ content: 'Your submission was received successfully!', ephemeral: true});
                        await channel.send({ content: `<@${interaction.user.id}> just registered!` });
                    } else {
                        await interaction.deferReply({ content: 'You are already registered!', ephemeral: true});
                    }
                }
            });
    }
}

const { SlashCommandBuilder, ActionRowBuilder, Events, ModalBuilder, TextInputBuilder, TextInputStyle, InteractionType } = require('discord.js');
const db = require('../../models');
const Customer = db.customer;
const config = require('../../Configs/config.js');

module.exports = {
    data: {
        name: "register",
        description: "Register as a customer or supplier.",
        dm_permissions: "0",
    },
    async execute(interaction, client) {
            const modal = new ModalBuilder()
                .setCustomId('registerModal')
                .setTitle('Register as a Customer & Supplier!');

            const characterName = new TextInputBuilder()
                .setCustomId('characterName')
                .setLabel("What's your in-game character name?")
                .setPlaceholder('Enter in-game character name')
                .setStyle(TextInputStyle.Short);

            const guildName = new TextInputBuilder()
                .setCustomId('guildName')
                .setLabel("What's your in-game guild name?")
                .setPlaceholder('Enter in-game guild name')
                .setStyle(TextInputStyle.Short);

            const customerType = new TextInputBuilder()
                .setCustomId('customerType')
                .setLabel("What role do you wish to fulfill?")
                .setPlaceholder('Supplier / Buyer / Both')
                .setStyle(TextInputStyle.Short)
                .setRequired(true);

            const comment = new TextInputBuilder()
                .setCustomId('comment')
                .setLabel("Do you want to add something else?")
                .setStyle(TextInputStyle.Paragraph)
                .setRequired(false);

            const characterActionRow = new ActionRowBuilder().addComponents(characterName);
            const guildActionRow = new ActionRowBuilder().addComponents(guildName);
            const customerActionRow = new ActionRowBuilder().addComponents(customerType);
            const commentActionRow = new ActionRowBuilder().addComponents(comment);

            modal.addComponents(characterActionRow, guildActionRow, customerActionRow, commentActionRow);

            await interaction.showModal(modal)
            client.on(Events.InteractionCreate, async (interaction) => {
                if (!interaction.isModalSubmit()) return;
                if (interaction.customId === 'registerModal') {
                    const guild = await interaction.client.guilds.fetch(config.GUILD_ID);
                    const channel = await guild.channels.fetch(config[`REGISTER_FEED`]);
                    const customer = await Customer.findOne({ where: { discordId: interaction.user.id } });
            
                    if (!customer) {
                        await Customer.create({
                            discordName: interaction.user.tag,
                            discordId: interaction.user.id,
                            gameName: interaction.fields.getTextInputValue('characterName'),
                            gameGuild: interaction.fields.getTextInputValue('guildName'),
                            userType: interaction.fields.getTextInputValue('customerType'),
                            comment: interaction.fields.getTextInputValue('comment'),
                        });
                        await interaction.reply({ content: 'Your submission was received successfully!', ephemeral: true});
                        await channel.send({ content: `<@${interaction.user.id}> just registered!` });
                    } else {
                        await interaction.deferReply({ content: 'You are already registered!', ephemeral: true});
                    }
                }
            });
    }
}

rawError: { message: 'Unknown interaction', code: 10062 }

rawError: { message: 'Unknown interaction', code: 10062 }