HardhatError: HH101: Hardhat was set to use chain id 11155111, but connected to a chain with id 1.

[bobbywilliamajor]

`require("@nomicfoundation/hardhat-toolbox")
require("dotenv").config()

/** @type import('hardhat/config').HardhatUserConfig */
const SEPOLIA_RPC_URL = process.env.SEPOLIA_RPC_URL
const SEPOLIA_PRIVATE_KEY = process.env.SEPOLIA_PRIVATE_KEY
module.exports = {
defaultNetwork: "hardhat",
networks: {
sepolia: {
url: SEPOLIA_RPC_URL,
account: [SEPOLIA_PRIVATE_KEY],
chainId: 11155111,
},
},
solidity: "0.8.8",
}`
l am getting the following error
HardhatError: HH101: Hardhat was set to use chain id 11155111, but connected to a chain with id 1.
The code above used to work now it's refusing to connect to the sepolia network through alchemy in order to deploy my contract.