How Can I Sign Apk With Same Signatures as Other App

Hi There, I am having Two Apps.
First App Package - com.example.com
Second App Package - com.example.com
Both are created from different online tools.

First app Version is 1.0
Second app version is 1.1
So My Question is, How to Sign Second app with same Signature as First App?
First App is already published on play store.
Reason - I want to update Second App On PLay Store over First app, but it requires same signature.
Any way to sign one apk from different apk signatures,
It's very urgent, if anyone can help me here? :crying::crying::crying: