Minecraft wiki entry for Before_Village_%26_Pillage, associated text: Villagers would deactivate an offer if the offer had been used some number of times. The chance of an offer's deactivation was random, but an offer had to be used at least 2 times before it was eligible for deactivation. After an offer had been used 12 times, it was guaranteed to be deactivated. Trading a different offer would sometimes activate an offer again. When an offer was disabled, a red X would appear in the trading interface, and it had the same particle effect as an offer being created.