Query (updateOne) is creating data multiplied in MongoDB - node.js

Question

Hello devs. Without further ado...
I have a problem updating a column in the database. When performing an update on a column it is multiplying the data. It doesn't make any sense since the multiplied data contains the same _id. And that _id is a unique value.
Here is a part of the code that contains the query:
const addressId = await new Promise(async function(resolve, reject) {
await Cadastros.updateOne({_id: user_id}, {$push: {enderecos: endereco}}, (err, raw) => {
if(err){
if(!err._id) return reject(false);
if(err._id) return resolve(err._id);
}
return resolve(false);
});
})
This algorithm is responsible for adding a new address to the user's registration in the database using the $push method.
Follows the Schema JSON:
{
cpf: {
type: String,
required: true,
unique: true
},
email: {
type: String,
unique: true,
required: true,
max: 100,
lowercase: true
},
senha: {
type: String,
max: 100
},
nome_completo: {
type: String,
max: 100
},
data_de_nascimento: {
type: Date
},
sexo: {
type: String,
default: null
},
enderecos: [
{
nome_completo: {
type: String
},
cep: {
type: Number
},
endereco: {
type: String,
max: 60
},
num: {
type: Number
},
bairro: {
type: String,
max: 60
},
cidade: {
type: String,
max: 30
},
estado: {
type: String,
max: 2
},
complemento: {
type: String,
max: 21,
default: ""
},
referencia_end: {
type: String,
max: 60,
default: null
},
celular: {
type: Number
},
principal:{
type: Boolean,
default: false,
}
}
],
ip: {
type: String,
max: 45
},
user_agent: {
type: String
},
fingerprint: {
type: String
},
device_info: {
type: String
},
exists: {
type: Boolean,
default: false
},
data_criacao: {
type: Date,
default: Date.now()
}
}
It is also the only middleware in the same table:
CadastrosSchema.post('updateOne', async function(doc, next){
const data = this.getUpdate();
if(data.$push ? data.$push.enderecos : false) return next({_id: data.$push.enderecos._id})
next()
})
And the middleware part was a workaround, but it was the only way I found to return the _id generated from the added subdocument.
Here is the multiplied subdocument:
There are two subdocuments with the same _id. It didn't make any sense to me.
Anyone who knows what is going on and can bring a solution is grateful. There may also be other people with the same problem, so that would help not only me but other people. If there's a problem with that code, I can't see it.

Answer 1

Change $push for $addToSet solved my problem.