I had a Redmine ticket I had been working on with our customer support team at work. After working through the initial ticket that was loosely related to a customer initially ended up being a larger issue and I decided to move the ticket to an engineering project as that is where I actively work tickets typically. When I attempted to move the ticket I received an error stating that it had failed to save. Below I describe what the issue ended up being and how I temporarily modified a setting so I could move the ticket.
You can edit any part of a ticket within Redmine though sometimes it is not always straight forward. I was shuffling around the way tickets are classified in one of our projects and wanted to move tickets from one Tracker classification to another and was unable to do so by Updating or Editing the ticket. Then I realized by moving the issue you can not only move the issue between Projects but you can also move the ticket between Trackers.