Couldn't able to create a case with case number 00001002 Because the datatype of the case number field is autonumber.

I couldn't able to complete the module "Service Cloud Agent Productivity" because in "Use All the Tools Together" chapter couldn't able to create case with number "00001002".

#Trailhead Have to select case numbers 00001002 and 00001016.The Case number field datatype is autonumber and that field is standard object. When I create new case the case number starts from "00001026".How can I complete that module? This is the error message shown while earning points, "We couldn’t find an email post in the case feed for case number 00001002. Make sure that you run the macro on case 00001002, and that you use the Classic email template Support: Escalated Case Notification. To verify that the email was successfully sent, look in the case feed."