How do I remove duplicates in my Lightroom Catalogue?

[Anniewok]

I have merged an old Lightroom Catalogue in to my Main Lightroom catalogue and accidentaly created duplicate images, thousands of them (sometimnes triplicates), I guess I must have performed the process before, foregotten, and not deleted the catalogues I was merged after I'd merged them.... then come back and done the process again... thus creating duplicates.

My problem is I want to remove the duplicates without losing the edited versions; just those I have meged in.  The folder has many subsequent images which are not duplicated , so I cant start the process again?

[Rob_Cullen]

@arina28630140zmc3  Thanks for the link to 'Duplicate photos fixer'. I perused the site for information. It claims that it can search a Lr-Classic database, but does it indicate which of the "duplicates" it finds have had edits done in LrC?

Unless I mis-understood, it still seems to me, that any 'external' duplicate finder (not a LrC plugin) will not tell you if the image has been edited in LrC, so you run the risk of deleting photos that have had extensive editing work done in Lr-Classic.

The free plugin from Teekesselchen: is still TBMK one of only two dup finders that allows you to check the edited status of duplicates that it finds in the Catalog - before you delete them.

DUPLICATE FINDER Teekesselchen: Home  (Norton reports site is unsafe- but no problems for me.)