The official website for The Settlers of Catan

Question about Candamir - The First Settlers General Questions - May I own two of the same type of equipment? For example, if I have found a pair of boots for the second time, may I place the equipment marker with the number 2 at will?

Answer

No. If a player lands on an exploration tile whose equipment he already has, he receives an experience point instead, which he can use to improve one of his character's traits (Strength, Prowess, Agility, and Charisma). Nobody is allowed to have two of the same type of equipment.