Please help me I want to make an Automute but I have a problem

When a muted user left the server the console gives me this error:

/Users/Fred/Desktop/Papera Bot/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:149
          const err = new MongooseError(message);
                      ^

MongooseError: Operation `muted-members.insertOne()` buffering timed out after 10000ms
    at Timeout.<anonymous> (/Users/badreddinelaghlid/Desktop/Papera Bot/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:149:23)
    at listOnTimeout (node:internal/timers:557:17)
    at processTimers (node:internal/timers:500:7)

then when the user join the server again the bot don't give the mute role to the user

I try to make this codes with mongoose

the schema code of the model:

const client = require("../index");
const Schema = require("../models/muted");

client.on("guildMemberAdd", async(member) => {
    const data = await Schema.findOne({Guild:member.guild.id});
    if (!data) return;
    const user = data.User.findIndex((prop) => prop === member.id);
    if (user == -1) return;
    let muteRole = message.guild.roles.cache.find(role => role.name === 'muted');

    member.roles.add(muteRole.id);
});

the code of guildMemberAdd:

const client = require("../index");
const Schema = require("../models/muted");

client.on("guildMemberAdd", async(member) => {
    const data = await Schema.findOne({Guild:member.guild.id});
    if (!data) return;
    const user = data.User.findIndex((prop) => prop === member.id);
    if (user == -1) return;
    let muteRole = message.guild.roles.cache.find(role => role.name === 'muted');

    member.roles.add(muteRole.id);
});

if you need any information from my code/bot to help me you can tell me guys

thanks for attention!