Repair both of them using anvil, place the level 2 or level 1 item in the first slot and the latter in the second slot
End result item will lose any of their levels
Method 2
Get any levellable item to level 2
Get one other item of the same type to level 1
Repair both of them using vanilla crafting slot
End result item will lose any of their levels
When repaired using minerals such as diamond, the end result item will lose their lore but their level will be maintained and re-added into the item lore after gaining experience
Expected behavior:
Either the highest level or the first slot of anvil should keep their level when repaired
Version:
Paper 1.18.1 build 101
Latest version of LevelTools
Method 1
Method 2
When repaired using minerals such as diamond, the end result item will lose their lore but their level will be maintained and re-added into the item lore after gaining experience
Expected behavior:
Version: Paper 1.18.1 build 101 Latest version of LevelTools