Cant post a good pic because there's apparently a flypocalypse rn and every time my legs go still for a single second there's like 4 flys swarming, will post a better pic soon
This was done with a few denominations in that year, so I'm assuming it was intentional. Hopefully someone will know the answer, because I've wondered why it happened too.
It is not unusual. There is a year of issue 2016 then they print them in different years. They have done that in Canada for a while. The referee for Indonesia has not kept up and since the fall of Pick numbers there is no one keeping the variants tracked properly on a world scale. Numista is one of the sites that usually tracks them but is not the recognized authority on them.
Banknote Museum has them up to 2021 so they are behind too and they lump the variants into one Pick, P156.
It is not unusual. There is a year of issue 2016 then they print them in different years.
These 2024 notes are unusual, the note discussed in this thread, a 20,000 Rupiah, and a 100,000 Rupiah are the first notes of the 2016 series printed since 2021.