Getting error in enketo form while saving the enketo form data as a save draft / submitting in ODK Central. Tried to change the record name / ID but still same error appears.
Referenced error snapshots have been attached for the same. Kindly help.
What version of Central are you running? There were some known cases in which this would happen in older web form versions but it is unexpected otherwise. It would be helpful to know whether it could be an older version or not.
https://github.com/enketo/enketo-express/issues/416 is the related issue that I had in mind. However, this looks different because it's the server reporting a duplicate. Did anything unusual happen when attempting to send? Have you seen this with multiple submission attempts or just one?
One thing you could try is to click the export button and find out the instanceID of the submission. Then you can look that up in the submission table on Central (using your browser's search, e.g. CTRL+F). You can edit the record from Central to compare the data there and in the exported record. Are they the same or different? Were they from the same person?