Hello. I found the following explanation on the guide page. Duplicate acquisition of degradable items is not a problem, but duplicate acquisition of items such as emotes seems to be a bug. Thanks for commenting. Duplicate Items: Some items from Bright Engrams can be acquired multiple times. Duplicates can be dismantled to provide the player with Glimmer and / or Legendary Shards. Other items, such as Emotes and Finishers, can only be acquired once because they unlock the access rights for the item on the player's account and can then be retrieved from the associated Collection. https://help.bungie.net/hc/en-us/articles/360049023872-Destiny-2-Eververse-Items-Guide