If your existing ERC20 token is already doing the same function as 4626, then there is no point in creating a new one. It would be a waste of time and resources to create a new token when the existing one is already doing the job. It would be better to focus on improving the features of the existing token and making sure it is functioning properly. Additionally, it may be beneficial to look into other ways to improve the token, such as increasing its usability, making it more user-friendly, and adding additional features.