I managed to temporarily "fix" the trader llama part by loading up a version before TLs were added (19w04b), going into the TL chunk and then loading it up again in 19w08b. There werent any "physical" additions since then apart from foxes and leather horse armor so your saves should probably be fine, still reccomend a backup. Also doesnt prevent more WTs with TLs from spawning.
Dish_Honored
I managed to temporarily "fix" the trader llama part by loading up a version before TLs were added (19w04b), going into the TL chunk and then loading it up again in 19w08b. There werent any "physical" additions since then apart from foxes and leather horse armor so your saves should probably be fine, still reccomend a backup. Also doesnt prevent more WTs with TLs from spawning.