Android apps are signed with a private key. To ensure that app updates are trustworthy, every private key has an associated public certificate that devices and services use to verify that the app update is from the same source.

NOTE: ONLY THE ACCOUNT OWNER CAN DO THIS

Step 1 - Go to Play Console

Step 2 - Select the app

Step 3 - Under "Release", select "Setup" and Click on "App signing"

Step 4 - Scroll down to Request upload key reset section

Step 5 - Click on Request upload key reset

Step 6 - This will ask for .pem file which is to be provided by Appbrew team

Step 7 - Upload the file

Play store take around 3-4 days to reset the keys