Signing and uploading question of new version of an existing app.

I need help with signing a new version of an existing app. The original app was last uploaded over 2 years ago. I do not see a developer certificate or a distribution certificate in my keychain for the app. I have created a new Apple Development Certificate and a new Apple Distribution Certificate. There are NO current Provisioning Profiles. When I go to sign the new code (swift 5 to conversion) manually, what is the proper way to do it so that it can be used as an upgrade to the existing app in the App Store?


Thank you ahead of time!

With a current paid dev account, and Xcode set to auto codesign for that app, there shouldn't be a question here. Example is Xcode 11.4

Signing and uploading question of new version of an existing app.
 
 
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