When rolling the consolidation file forward you need to take 3 things into consideration:
First ensure that all external files have been rolled forward to the new year.
Roll the consolidation file forward to the new year.
Open the rolled forward consolidation file:
Go to the Engagement > Consolidate dialog and relink the consolidation structure to the new year's files by going to the properties of each external entity and browsing to the new rolled forward file. Also ensure that you uncheck the Include prior year balance data checkbox.
Click on OK.
Click on Apply and OK once all the entities have been relinked.