What is the problem? Please be detailed.
To get everything up and running, I uploaded the Geotagger example to my sync-endpoint instance. Logging on to the web-ui I can delete the 'rows' but I don't seem to be able to delete the manifest, so the blank form keeps re-syncing to my device. I can remove it from the device by deleting it in ODK Tables but as soon as I re-sync/reset the app server, it comes back again?
What ODK tool and version are you using? And on what device and operating system version?
ODK2 on Ubuntu 18.04 and Android devices