As discussed elsewhere, the old localized User_talk prefix is not being treated as an alias to the new one. This is causing (among other things) the "Flow-enabled" user talk pages to show the wrong "description" (see immediately to the right of this comment). If you make this kind of edit on all the user talk pages tagged with the {Wikitext talk page converted to Flow} template, it should fix this problem (see the results at वापरपी_चर्चा:RahmanuddinBot).
वापरपी चर्चा:The Discoverer cher vixoi
Note: I've also left a similar message at वापरपी चर्चा:Konknni mogi 24 (this wiki's sole admin).
Hello Dcljr, Thanks for your work in the Konkani Wikipedia. The old user talk namespace name is supposed to be an alias to the new one. The reason it's not working is that there is a syntax error in the Mediawiki localisation file. There is a patch in gerrit for this. I should ask someone to review and merge it. Once that is done, the alias will work. Hence, I think we do not need to do these edits.
Another problem is that Flow descriptions are showing old versions of the welcome template. The template has since been updated to fit better in the small place available. This is unfortunately a known issue with Flow.
Good to know the "fix is in" (as it were) for one problem, anyway…
I got tired of seeing the big, redlinked, old version of the welcome template (right side of page), so I've edited the "description" to update it to the new version. [grin] (Speaking of which, I've updated the template so it works on both regular talk pages, like this one, and on "archived" talk pages like ".../Archive_1".)