Unity3d error message: You uploaded an APK that was signed in debug mode

 

So, you have been making this android game. Tested it a lot of times on my your device(s) and now trying to upload it to google play. 
You got this problem:  "Upload failed You uploaded an APK that was signed in debug mode."

What should you do?

 

Here is the solution. You must create a new keystone and set it for released and not for debug.

1) Locate the Publishing Settings under PlayerSettings

2) Create a new keystore by selecting a keystore name and password (confirm the password)

3) Select "Create a new key" under Key Alias4) A new window opens; enter the necessary information.

5) Select the newly created key.

6) Build ( Run); your app is now signed.