Hoe can I delete API key of live version?

I made an app and recently released it.
I send the duplicated editor to the user who subscribe the app as an Educational material.

Before I send it to the users, I deleted all of the API keys like Stripe, Google and so on, but there still be filled when I swith the duplicate app into the live version from data tab.

I want to delete all of them, but the data of live version cannot be edited even the app have not deployed.

Does anyone have good idea to solve this problem?

Thank you.