We need to improve the site on the Yii2 framework

There is an integration of the program with the site where the archive is formed where there is a photo and flags for assignment on the site are determined, but after unarchiving, many duplicate photos are obtained and the main photo of the product is not assigned in this and there is the main problem.
I will provide all access to the Site to the developer, the amount of work is ready to agree and reserve.
This problem can be seen in any product www.fl.ru/away/?href=http...