Your Operation was forbidden issue in Firebase Console

Question

I created an Android Project. Now I want to add Firebase into my android project. I register my application on firebase console. Now When I try to add my sha-1 key in to project it gives me following error.

I search on google and stackoverflow but didn't receive any proper answer. According to some answers this error occurs when I insert same sha-1 key in to another project of firebase. Let me tell you that this is my only project in firebase console. I do not have any other project in this firebase account.

So what could be the problem and how can I add this sha-1 in my firebase project ?

Answer 1

Finally I Have solved issue my self,

Firebase internally stores each package name with associated SHA-1 Key. So When we are using same package name & SHA-1 in firebase, it will not allow to user it and produce the same error mentioned in the question. To solve we need to either change package name or need to user another keystore's SHA-1 key.