Create same geometry with different attributes

Hi, I have a polygon layer that represents the building footprint (attribute: building id). In .csv I have a list of apartments (attributes: building id, Apartman id). One building consists of x apartments. So, I need to x duplicates of the building footprint and each clone needs to have a different apartment id. I used the FeatureMerger to join shp and csv and clon to create duplicates of geometry but all duplicates have the same apartment id.