Hi Yang,
This is what it will look like with locks - in which case you can try stopping the service and manually deleting the lock files. As you have shown, this may not be the case.
To access the status.gdb - navigate through windows explorer to your cache files (arcgisserver/directories/arcgiscache/servicename/Layers). Copy the Status.gdb file to your desktop (or a location other than within the service files). Open ArcMap, and navigate to the geodatabase. There should be a Task Status feature class - within this there will be records of bundle names that have or have not completed successfully. When you find the record(s) that did not complete successfully at scale 4573.988705, use that bundle name to search for and delete it in windows explorer. Re-create this bundle by caching it again.
Just keep in mind that deleting the bundle will delete a bigger cache extent than just a tile.