System booking data to Opening Balance Adjustment during consolidation

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In our FCC environment, we have a department dimension containing level 0 members that match department parent accounts in the source EBS dimension, i.e. FCC does not contain the individual departments. In EBS at the start of new year, some level 0 departments are shifted to different parents. Since FCC contains only the parents, we can't move individual departments and their history. This caused a lot of effort in FCC for not much benefit, so we decided to load all source department data to No Department starting in FY22; however, we still had pre-FY22 in all of the existing Opening