Kintone will be updated on August 10th 2017.
This bug fix will apply to the Kintone API.

Kintone REST API

Bug fixes

• The bug occurred when an Action Name in Process Management that no longer exists is specified in the request parameter of Update Status API and Update Multiple Statuses API.
  • Before the fix: The record is updated with the action name that does not exist.
  • After the fix: The record cannot be updated with the action name that does not exist.