I just saw that on SE there is an update on the licensing. Since that may affect the content import (and also gives official dates for the license change), I thought I put up a pointer here.
At the same time, I noticed that the terms on writing.codidact.com don’t include the option to switch to a later version of the license when one comes out. Maybe such an option should be considered (so we don’t end up in the same licensing mess that SE got in).
The simplest solution would be to add an “or later” clause to the licensing, similar to how it is usually done on GPLed software. Another possibility would be to add the right to relicense to a later version of the license to the terms and conditions.
Of course, whatever we do should be carefully worded to not allow unilateral switching to a different license (including a different Creative Commons license) other than a newer version of the very same license.