Old Collection replaced my new Collection becavse of a linked IMG #

Question

I created an edited photo collection.  A few weeks later I wanted to retrieve that collection so I covld bvrn it onto a cd.  I vsed an IMG # from the DMG file to call vp the edited collection.  I vse my sd cards over and over again, so sometimes several photos are displayed that have the same IMG #.  I chose the wrong photo (a photo from an old collection) as the photo I wanted in my new collection and Lightroom changed my whole new collection into the old one - now I can't get my new collection at all... vnless I go back to the DMG files and re-edit the whole collection again.  How do I get Lightroom to reverse that process?  

Answer 1

A few weeks later I wanted to retrieve that collection so I covld bvrn it onto a cd.  I vsed an IMG # from the DMG file to call vp the edited collection.
I'm not following you here, to call up a collection, normally you click on the Collection name on the left, in the "Collections Panel". There are other ways of calling up a collection, using the "badge" on a photo, or right-click on a photo and select "Go To Collection". None of these matches your description. Please state in much more detail how you called up the "edited collection"; please state exactly where you clicked you mouse and/or exactly what menu commands were used.
What do you mean by an "edited collection"? Lightoom has Smart Collections, regular (static) Collections and Quick Collections.
Lightroom changed my whole new collection into the old one
Again, I can't imagine what you mean. Please give the exact sequence of steps here, exactly what did you click your mouse on, exactly what menu commands were used, etc.
Please state your operating system and version of Lightroom.
Last request: please use the letter u when the letter u is required, do not use the letter v to indicate the letter u. Thank you.