Error 30000 occurs when the fields (or objects) mapped to forms or part of the hierarchy drill down is deleted or otherwise altered in such a way that prevents salesforce from properly sending / receiving data. TaroWorks will then automatically close all affected jobs and forms for all users in to protect system data integrity.
Once closed, jobs and forms cannot be re-published again and therefore any completed jobs in devices cannot be synced and would be lost. It would be too late to "undelete" the fields or objects (or changing their names afterward) and this would have no effect.
Avoid the following where possible:
- Deleting an object (or a field) that is mapped to a form or part of the hierarchy drill down of a job; and,
- Changing the API name of an object (or a field) that is mapped to a form or that is part of the hierarchy drill down of a job.