Borrado permanente de formulario ODK no funciona

1. What is the problem? Be very detailed.
Quiero eliminar formulario, le doy eliminar pero a los minutos vuelve a aparecer.

2. What app or server are you using and on what device and operating system? Include version numbers.
ODK Aggregate v1.4.15 Production

3. What you have you tried to fix the problem?
Poder eliminar el formulario de manera permanente
4. What steps can we take to reproduce the problem?
Indicar que es lo que debo de hacer para poder eliminarlo permanentemente
5. Anything else we should know or have? If you have a test form or screenshots or logs, attach below.