Lesson 15. The code runs two times ¿WHY?

[AGMASO]

Hello @!!

I´m having an issue in the Lesson 15. As the Moralis server doesn't work anymore for free, I took the decision to build my own server using the Next.js features for server-side code and MongoDB as a database.

I manage to listen the events occurring in the blockchain. In this case
event ItemListing( address seller, address nftAddress, uint256 tokenId, uint256 price );
I wrote the code for the listener inside of getStaticsProps() from react/nextJs. The problem is that the code is running two times. So i get in my database two times the same Object with the same TokenId.

How to avoid this?

Here you have link to the Solidity contract, and nextjs app. Also i let you see my terminal, as you see, it runs twice.

https://github.com/AGMASO/nextjs-app
https://github.com/AGMASO/contract-solidity

You are connected to the dataBase You are connected to the dataBase

And this comes in my data base
_id
63fe4902353b6ca72b6eb4e4
seller
"0xB227673c8Fb86B8a9178d9E42A22fCF9321aFBBF"
nftAddress
"0x2d475fa54d402C5854c89Ec1A2Ac2F20eA7f80Fa"
tokenId
"35"
price
"0.01"

_id
63fe4902353b6ca72b6eb4e5
seller
"0xB227673c8Fb86B8a9178d9E42A22fCF9321aFBBF"
nftAddress
"0x2d475fa54d402C5854c89Ec1A2Ac2F20eA7f80Fa"
tokenId
"35"
price
"0.01"

Thank you in advance!!