1. Create a text type document and mapped fields to it.
2. Update the document with fields and contents - it's working.
3. Send the document to signers for signing.
4. Once the document is sent, when again trying to update then its throwing error 400.

PS: All the payloads sending each time is same.

Following screenshots is present for review.

 
Request URL:
http://40.124.26.81:88/api/documenttemplate/UpdateDocument
 

cc- Samir