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Unfortunately, there's no edit option for the Google Drive integration, if you need to change something, you will need to remove the integration and set it up again.
This is how it looks like in my end:
But I will forward this to our developers to see if they can add the function to edit an existing integration in Google Drive. However, this will be forwarded as a feature request and I'm unable to guarantee that this will be implemented anytime soon.
Apologies for the inconvenience.