I am very new to FDI. I am trying to bring data from the augmented table (Job Application History Event Details - Contains all history for job applications states phases) into a custom subject area I created - from The Talent Acquisition subject area in FAW. I found multiple identifiers in the augmented table, but all the identifiers from the augmentation table are numeric and the ones from the custom subject area are doubles. I can't find out any information related to this.

Are you only supposed to only join on entity keys?

Thanks very much!