Duplicates deleted/resolved

I was manually removing duplicates from the platform. Was everything working fine, but after some duplicates were deleted, when I clicked to resolve the duplicate the respective article duplicate started to not appear. So, the next day I entered Rayyan again to see if the platform was already working properly.  However, the duplicates were all automatically deleted/resolved, and I am not able to restore the articles that were deleted/resolved to the unresolved fold. How do I solve this problem?