Lost links for external files

Hello,
I am using Devon Pro 3 on a Mac. I moved up one level a big group in a database. Now the external files (PDF, Pages, Numbers) even if they are listed are not available. Devon “sees” them it says “Missing file” and shows the entire path to find the file. The path is perfectly correct.
I can go to each file and drag them indiviudally in place and it works.
Since it is time consuming and boring I wonder if there is a way to automate this process ?
Thanks for your help.
Philippe Mayor