Security advisory: Initialize UUPS implementation contracts

General Announcements
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Thank you @frangio I have upgraded the OpenZeppelin Upgradeable Contracts to version 4.3.2. I am using the following in my Smart Contract, and do not have any Constructor in my Contract itself:

contract MyContract is Initializable, ERC721Upgradeable, OwnableUpgradeable, PausableUpgradeable, ReentrancyGuardUpgradeable, 
ERC721EnumerableUpgradeable, ERC721URIStorageUpgradeable {

    function initialize() initializer public {
        __ERC721_init("MyToken", "MYT");
        __ERC721Enumerable_init();
        __ERC721URIStorage_init();
        __Ownable_init();
        __Pausable_init();
        __ReentrancyGuard_init();
    }

...
}

However, when I include the line constructor() initializer {} I receive the following error, which appears to point to OpenZeppelin and Truffle modules:

../project:/contracts/MyContract.sol:15: Contract `MyContract` has a constructor
    Define an initializer instead
    https://zpl.in/upgrades/error-001
    at Object.assertUpgradeSafe (.../node_modules/@openzeppelin/upgrades-core/src/validate/query.ts:17:11)
    at Object.deployImpl (.../node_modules/@openzeppelin/truffle-upgrades/src/utils/deploy-impl.ts:33:3)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at deployProxy (.../node_modules/@openzeppelin/truffle-upgrades/src/deploy-proxy.ts:46:16)
    at module.exports (.../migrations/2_deploy_contract.js:9:3)
    at Migration._deploy (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:75:1)
    at Migration._load (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:56:1)
    at Migration.run (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:217:1)
    at Object.runMigrations (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:150:1)
    at Object.runFrom (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:110:1)
    at Object.runAll (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:114:1)
    at Object.run (/usr/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:79:1)
    at runMigrations (/usr/lib/node_modules/truffle/build/webpack:/packages/core/lib/commands/migrate.js:258:1)
    at Object.run (/usr/lib/node_modules/truffle/build/webpack:/packages/core/lib/commands/migrate.js:223:1)
    at Command.run (/usr/lib/node_modules/truffle/build/webpack:/packages/core/lib/command.js:183:1)
Truffle v5.4.13 (core: 5.4.13)
Node v14.18.1

If I do not include that line, the Contract deploys properly.

Thank you again. J