My experience with these things is that
you'd have to be out there competing with the rest of us (!!) for a new package ADR, which could then just overwrite your existing ADR
(the system will prompt you to OK replacing the old ADR with the new package if you try for the same time -- no need to cancel the original ADR before trying for the package).
There hasn't been such a thing as just "adding" a package to a regular ADR, to my knowledge over the years.
Still - no harm in having a placeholder for your day anyway, and as I've been saying WHO KNOWS if they might do something differently this time... with ANY of this!