User A moves a task from column A to column B
User B has the same workboard open and - without refreshing the page - moves a task to column A below the above mentioned task (which technically is no longer there)
Below error appears, the task moving of user A is succesful, while user B's task returns to it's previous position.
If this happens because we do not have Aphlict Notifications configured in our instance it's fine.
phabricator 5767097824610cb3256056a3e99916fca9dda2b7 (Mon, Jan 30) (branched from 1be3ef02276812296c01e41122f19d6ea8077f81 on origin)
arcanist 9503b941cc02be637d967bb50cfb25f852e071e4 (Sat, Jan 7) (branched from ade25facfdf22aed1c1e20fed3e58e60c0be3c2b on origin)
phutil 10963f771f118baa338aacd3172aaede695cde62 (Fri, Jan 13) (branched from 9d85dfab0f532d50c2343719e92d574a4827341b on origin)