CF05 is a quest "The Best There Is", it has 3 apparel items involved, they are all the same item CF05_Clothes_SY920_EnsignUniformArmor01 assigned to 3 different aliases of the quest. After the quest is finished, these items can be transferred into the next universe via QED. There, if you drop the item on the ground and pick it back (maybe 2 times or more, can't say for sure), this item starts the CF05 quest with stage 1021. This happens because it has script DefaultRefOnContainerChangedTo >> DefaultRef >> DefaultRefParent, it calls CheckAndSetStageAndCallDoSpecificThing, it calls DefaultScriptFunctions.IsValidToSetStage, and it returns true because the top-level DefaultRefOnContainerChangedTo attached to the item has no PrereqStage property set.
Need to add the "PrereqStage" integer property = 1020. See the attached file.