Is it possible to merge lost issue boards with current issue boards from data?

Hi All,

We have hosted our gitlab environment privately.
Accidentally we had to rollback to the data backup taken a week ago back due to this we have lost 1 week issue boards and merge request.
Is it possible to merge the data using database of any other best way to handle the scenario
We are using gitlab(10.1.4) omnibus postgreSQL as a database.

Early help will be really appreciated.

Thanks in advance!