NullReferenceException at FinalDestination.ForgetError
hello, i get this NRE if a spawned NPC kills a player

NullReferenceException: Object reference not set to an instance of an object
  at NPCHumanContext.set_LastAttacker (BaseEntity value) [0x0001c] in <a6e803dfe07d49ef9468a9ebf8507b2c>:0 
  at Oxide.Plugins.RaidableBases+FinalDestination.Forget () [0x000aa] in <c20c0119b1104c5a8716518427238a2c>:0 
  at Oxide.Plugins.RaidableBases+FinalDestination.Attack () [0x0003f] in <c20c0119b1104c5a8716518427238a2c>:0 
  at InvokeHandler.DoTick () [0x000bd] in <6d50fd581c3d4045936fc920947f0265>:0 
  at InvokeHandler.LateUpdate () [0x0000c] in <6d50fd581c3d4045936fc920947f0265>:0 ​
you need to update