Rejecting because slot same, found : 4 new : 4

Is this a BypassQueue thing or a Rust thing ?
I've never seen that warning until today.

I don't use this plugin but getting same:

(17:39:12) | rejecting because slot same, found : 4 new : 4
(17:39:13) | rejecting because slot same, found : 4 new : 4
(17:39:19) | rejecting because slot same, found : 4 new : 4
if you've found a solution, thanks to share ;)

This message does not come from a plugin, it come from a function in Rust  :   RidableHorse.CanAnimalAcceptItem(Item item, int targetSlot)

Debug.Log("rejecting because slot same, found : " + (int)component2.slot + " new : " + (int)component.slot);​

Thanks Lorenzo ;)