Duplicate Struct Import on Factory from Contract

After upgrading @typechain/hardhat and ethers-v5 an issue arose: Duplicate identifier. This happened for a single struct in one contract, and all contracts inheriting from said contract.

The error occurs with the following package.json:

 "devDependencies": {
        "@codechecks/client": "^0.1.11",
        "@commitlint/cli": "^13.1.0",
        "@commitlint/config-conventional": "^13.1.0",
        "@nomiclabs/hardhat-ethers": "^2.0.3",
        "@nomiclabs/hardhat-waffle": "^2.0.1",
        "@solidstate/contracts": "^0.0.29",
        "@solidstate/spec": "^0.0.29",
        "@typechain/ethers-v5": "^8.0.5",
        "@typechain/hardhat": "^3.1.0",
        "@types/chai": "^4.3.0",
        "@types/fs-extra": "^9.0.12",
        "@types/mocha": "^9.0.0",
        "@types/node": "^17.0.13",
        "@typescript-eslint/eslint-plugin": "^4.29.2",
        "@typescript-eslint/parser": "^4.29.2",
        "chai": "^4.3.4",
        "commitizen": "^4.2.4",
        "cross-env": "^7.0.3",
        "cz-conventional-changelog": "^3.3.0",
        "dotenv": "^10.0.0",
        "eslint": "^7.32.0",
        "eslint-config-prettier": "^8.3.0",
        "esm": "^3.2.25",
        "ethereum-waffle": "^3.4.0",
        "ethers": "^5.4.6",
        "fs-extra": "^10.0.0",
        "hardhat": "^2.6.1",
        "hardhat-deploy": "^0.10.4",
        "hardhat-deploy-ethers": "^0.3.0-beta.13",
        "husky": "^7.0.1",
        "lint-staged": "^11.1.2",
        "mocha": "^9.1.0",
        "prettier": "^2.3.2",
        "prettier-plugin-solidity": "^1.0.0-beta.17",
        "shelljs": "^0.8.4",
        "solhint": "^3.3.6",
        "solhint-plugin-prettier": "^0.0.5",
        "solidity-coverage": "^0.7.16",
        "ts-essentials": "^9.1.2",
        "ts-generator": "^0.1.1",
        "ts-node": "^10.4.0",
        "typechain": "^6.1.0",
        "typescript": "^4.5.5"
    },

The error given is:

typechain/factories/SomeContractFactory__factory.ts:18:3 - error TS2300: Duplicate identifier 'PayoutsStruct'.

18   PayoutsStruct,

PayoutsStruct is a custom struct, and is being imported 2x from the auto-generated contract file SomeContract .

The command being run is: yarn cross-env TS_NODE_TRANSPILE_ONLY=true hardhat typechain

The error seems to be created only by the versions of typechain/ethers-v5 and typechain/hardhat. When reverted back to ^7.0.1 and ^2.3.0 respectively, the errors vanish.

dethcrypto / TypeChain

Duplicate Struct Import on Factory from Contract #619