I completely understand if I did this incorrectly, but here's how you can reproduce what I did.

• Create Project A
• Create Milestone 1 under Project A
• Create a workboard for Project A and add some tasks to the Milestone 1 column
• Decide that you don't want milestones, but named columns
• Archive Milestone 1 (without moving the tasks to Backlog first because I guess I went braindead)
• Use the maniphest advanced search to search for all the tasks that still have the archived Milestone 1 tag
• Bulk edit these tasks to remove Milestone 1 tag and add Project A tag (my thought process was that this would stick them in the Backlog column on Project A's board)
• Go browse Project A's board and see nothing in the backlog
• Manually browse to one of the tasks and see that it is still in the Milestone 1 column of the Project A workboard (projects got replaced but column stayed?)
• Manually edit the task and remove Project A and save. Re-edit the task and add Project A back. This still displays Milestone 1.

Now, I can manually visit all of these tasks and do the Move on Workboard action but that's a pain. Is there a query I can run assuming I know all the task/project phids to update the workboard column?

Also, how should I have done this the right way?

Here's my version info: