Lightroom Classic migration deleting photos from Lightroom (non classic)

Hello,

I am using the lastest version of Lightroom Classic as well as the newest version of Lightroom. My wife likes the classic version better but I prefer the molbility of the new Lightroom. I went through the steps to migrate her library in to my Lightroom (non classic) and I literally watched while photos began disappearing from MY Lightroom.?!?!?! I opened uip the app on my iPad Pro and they instantly disapeared. She has some of the same photos and has deleted them from her library in the past. I assuming Lightroom thinks I no longer want these photos in my albums. Has anyone experienced this? Am I doing something wrong? I immediately stopped the migration but lost about 20 photos. My photos are backed up locally now but I'm not sure how that would help. Any ideas? I want to use the migration tool but not if there is ANY chance of losing photos in Lightroom. Thanks for the help.

Robert