I suspect GJFK-C7M and KZLV-6DJ are the same person how do I link them?
I think the second ID, KZLV-6DJ, has an error in it. The person with that ID no longer exists, and it appears that record was merged into a Scottish record several months ago.
Good to know, how do i change my First ancestor to GJFK-C7M?
I work in the new person view. I suggest you do too. There you see pencil icons all over. Click any of those to start editing data. (In the old person view you click the word edit.) You also see plus signs. Click those to add events, facts, spouses, parents, other relationships or a life sketch. If you have sources to add, add them at the option up top. Click collaborate to add notes or a discussion. Click memories if you have photos or documents about the person. If you want to search for sources, click the FamilySearch link on the right. Although I warn you no sources that come right up. (I tried it). You may have to dive into specialized research with French or Canadian sources. Look into groups to find help with locating those sources.