I just tried to move several pages on Meta-Wiki, and all meet the same issue:
21:30, 19 October 2021 Pols12 talk contribs encountered a problem while moving page Community Wishlist Survey/declined/en to Template:Community Wishlist Survey/declined … 21:37, 19 October 2021 Pols12 talk contribs encountered a problem while moving page WMDE Technical Wishes/in development/ko to Template:WMDE Technical Wishes/in development
Notes:
- According to log, system tries to move translation pages (/en, /ko) over source page (which has already been moved, so it already exists. Maybe that’s why it fails and log it)
- These are trans-namespace moves (from main to Template:).
- /en translation page for target is well created (so it is a duplicate since original one is kept), but other translations are not created
- No issue in for unit pages in Translations: namespace.