error while uploading .apk on google play

Question

I have developed an app which is already in market, now I am trying to upload new version of that app but every time an error is occurring, can anybody tell me solution I am attaching my screenshot of google play.Below are images

Answer 1

In Google play they maintain the Hierarchy of version code. In your case you published version 5 apk already if you want to upgrade just change the new apk version to 6 and upload it to Google play.You can't directly jump from 5 to 8 version.

Thanks...