I may recommend to give a try TW 5.1.23 https://tiddlywiki.com/prerelease/
It has great improved import UI and notify you for existing tiddlers. On Monday, November 23, 2020 at 8:50:16 AM UTC+3:30 JWHoneycutt wrote: > My primary wiki has grown too large and slow (saves take 15 seconds) . I > am carefully removing filtered tiddlers using the "Filter" tab in > "$:/AdvancedSearch" to a JSON file. I then drag and drop this JSON file > into the new (rapidly growing) wiki. Later I plan to delete tiddlers from > the primary wiki. > > I have noticed that I can overwrite a tiddler of the same exact title > name. This worries me, since I am used to my primary wiki warning me when I > am about to do this. I expect it to suggest "A tiddler with that name > exists. A new name will be used!" > > How do I give my new wiki this protection? (I have forgotten where I found > this) > > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/63099d95-dc7d-46a3-b14c-14ecb79a5e9bn%40googlegroups.com.

