Legal - Apple Media Services - Apple - https://www.apple.com/legal/internet-services/itunes/us/terms.html - "REDOWNLOADS
You may be able to redownload previously acquired Content (“Redownload”) to your devices that are signed in with the same Apple ID (“Associated Devices”). You can see Content types available for Redownload in your Home Country at https://support.apple.com/HT204632. Content may not be available for Redownload if that Content is no longer offered on our Services."
I think if an item gets removed and then re-entered as a different item it will also be seen as "new". Always keep a backup of everything you buy.