修正了那些疑惑或者同样问题的人。

I publish a game using package name "com.Company.MyGame" sign with "MyKey.keystore", then i publish a Google Play Game Service link with "com.company.MyGame" with "MyKey.keystore". Obviously it doesn't link because of case sensitive.

Now i try to create another Google Play Game Service to link with "com.Company.MyGame" with "MyKey.keystore" but it prompt me an error saying "Package name and certificate fingerprint combination already exists"

But this doesn't make sense since "com.Company.MyGame" should be different from "com.company.MyGame"

Is this a bug from google side or did i miss something? also can anyone provide me a solution on this?

sorry for my bad english and i appreciate any help. thanks

Fixed, for those who wonder or have same issue.

Turn out i do have a duplicate project which i deleted long ago, but when you go to the page where you can set your project API and click on "manage all project", the deleted project actually still there and you'll have to delete it here.