The Unique tag is applied to non-unique variants of Armour, Melee, & Ranged equipment when armour enchanted with Luck of the Sea is equipped.

Reproduction Steps for Chests & Mob dropped gear:

1. Equip armour enchanted with Luck of the Sea.
2. Enter a mission.
3. Open chests & defeat mobs during the mission.
   Observed result: Some non-unique equipment drops possess the unique tag.
   Expected result: Unique tag to not appear on non-unique equipment.

Reproduction Steps for merchant offerings:

1. Equip armour enchanted with Luck of the Sea.
2. Interact with the Village Merchant, Luxury Merchant, or Piglin Merchant
3. Restock merchant inventory.
   Observed result: Some non-unique equipment presented possess the unique tag.
   Expected result: Unique tag to not appear on non-unique equipment

Issue differs from MCD-6330 in that this occurrence is not limited to Ancient Mobs.
Have not yet observed an Ancient Mob drop non-unique equipment with the unique tag,