You can make composite key on ImageSetId & ImageID. It will solved your problem.

Combination of both fields will be trated as unique.

Thanks for reply.

I have 30 different filed like "professional" on single screen. How do i manage in three tables?

Currently i am designing database for Portal.
On Portal screen, There are some fields which are having multiselection facility

e.g

1) professional is one of the field having
1)photographer...