The Palgwes were finished around the mid 1960s. In the early 1970s, that same committee, plus others from the JDK & MDK created the Taegueks, which were finished around 1972. Not sure when the official swap, if any was ever done.
The Palgwae poomsae and Yudanja poomsae were finished in 1968. The Taeguek poomsae and Koryo 2 was completed in 1972. If you are going to parrot me, at least do so accurately.