Unhandled exception when trying to use msIndexedDB?

Question

Here is my code:

 var request = window.msIndexedDB.open("testDB", 1);
 request.onsuccess = function (evt) {
        var test = request.result;
        console.log(test);
        var store = evt.currentTarget.result.createObjectStore("rawr");
    };

}

On the line with createObjectStore it just crashes with the error: 0x800a139e - JavaScript runtime error: [object IDBDatabaseException]. What is going on here? The console.log writes [object IDBDatabase].

EDIT: I just tried catching the exception and it has a message: Indexed Database Exception: NOT_ALLOWED_ERR (6)