When creating a new API Key in your Infura Dashboard, you might run into an "Over project allotment" error. This means you have reached the maximum number of allowed API Keys in your Infura account.
The Infura Core tier allows you to create up to 3 API Keys. If you'd like to create more API Keys, consider upgrading to a paid tier, which allows you to create 10 projects.
Additionally, you can always remove existing API Keys from your account to make room to create new ones. You can read more about How To Delete an Infura Key.