Hello Community, 
I'm currently working on the "Build an Account Geolocation App" project in the Trailhead Project section. I'm having an issue on "Step 2: Use the AccountLocator Component in a Lightning Application"

My issue is this:

The Steps:
1.In the Developer Console, select File > New > Lightning Application.
2.Specify AccountLocatorApp as the bundle name, and click Submit.
3.On the AccountLocatorApp.cmp tab, implement the application as follows:

After I go to step 2 and submit the AccountLocatorApp name it gives me an error stating:

"duplicate value found: <unknown> duplicates value on record with id: <unknown>"

Then this error:
Operation did not complete "Long running operation did not complete, continuing in background"

I would like some assistance or insight into this issue community. Thanks.