How can you fix it? With great difficulty. I think that was one of the first warnings we were ever given with UFT ... NOT to import gedcoms into our main project. And why would you WANT to? Do you know the extent of research and sourcing that these people have done? How much incorrect data are you adding to your project. Your best bet is to look at the gedcoms and extract what you feel certain is correct and add a bit at a time into your main project. You can also set up a new file and save a gedcom in it, fix that project up until you're happy with it (deleting any names that might become duplicates in your main project files, etc.) until you are ready to then merge that project to your main project.