How to complete delete an iOS app data from keychain manully

I'm an test associate. Developers in my organisation have made a mistake in the code. After deleting the app, it leaves behind certain keychain data, which stops me from installing any other version of the app and testing it. Let's take the error build as "X" and other build as "Y" For X build alone i'm getting 200 response from charles proxy. For all other builds Charles proxy response shows 401 unauthorised for any other version of the app. Is there a way to remove the app data from keychain?