Thanks for providing this info. It was good talking to Riccardo about this at FOSDEM, and I'm glad to hear your team is working on it.

It looks from http://en.wikitolearn.vodka/Special:Version like you're using all of core, LiquidThreads, and Flow from 1.26 release branch, which makes sense.

A few questions:

• Is https://github.com/WikiToLearn/WikiToLearn/blob/master/LocalSettings.php the complete LocalSettings.php file? Are there any custom settings in the development environment that might be relevant? Particularly, any Flow (wgFlow*) or LiquidThreads (wgLqt* or wgLiquidThreads* config).
• What do you mean "showing at the same time the old liquid threads and the new Flow interface"? Can you post a screenshot? It shouldn't be able to be both for the same page, due to https://git.wikimedia.org/blob/mediawiki%2Fextensions%2FFlow.git/REL1_26/Hooks.php#L1436 .

Without testing, my guess is:

• Maybe you have the lines at https://github.com/WikiToLearn/WikiToLearn/blob/master/LocalSettings.php#L396 uncommented in the dev environment, making user talk Flow.
• Somehow that is leading to an inconsistent state when migrating the existing LiquidThreads user talk to Flow.

If so, try:

• Not enabling Flow in any namespaces (comment out those lines).
• Do the migration (despite Flow not being enabled on any namespaces, LiquidThreads pages can still be converted). This is what we did at MediaWiki.org (though with different settings), and are working on at ptwikibooks (closer settings to yours I think).
• After all LiquidThreads pages are successfully converted (first in dev, then prod), enable Flow on namespaces. This will make non-existent pages Flow going forwards.

Hey guys,

sorry for not replying earlier. I had some other issues to take care of.

In the end to make everything work (well, sort of work) we had to drop all the liquidthread dicussions (by manually deleting them from the Database). Mainly because for no reason the migrate script stopped working (i don't remember the exact error, it was a few months ago, it was something about a "missing class", but the class was in the correct folder and I tried everything to make the script work (including a clean clone of Flow)).

As a final result we got flow working but without keeping the old discussions (we decided it was ok).

Right now we are facing another problem with Flow (about the discussion page not working on the first load ever), if I don't find any solutions I will create an issue here.

Sorry for not beign that helpful with this problem (by not providing additional informations).