Console spam whenever a barrel is broken

I get this console spam whenever a barrel is broken. I'm guessing its an issue between the two plugins InstantBarrel and DynamicMonuments. Could you have a look into this? Its a commonly used plugin so I imagine many people will have this same issue if its the cause.
 

Failed to call hook 'OnEntityTakeDamage' on plugin 'DynamicMonuments v1.0.8' (NullReferenceException: Object reference not set to an instance of an object.)
  at Oxide.Plugins.DynamicMonuments+CustomMonument+<>c__DisplayClass41_0.<IsMonumentEntity>b__1 (Oxide.Plugins.DynamicMonuments+LootContainerData x) [0x0001e] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonumentsExtensionMethods.ExtensionMethods.Any[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) [0x00010] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonuments+CustomMonument.IsMonumentEntity (BaseEntity entity) [0x0003f] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonuments+CustomMonument+<>c__DisplayClass20_0.<GetMonumentByEntity>b__0 (Oxide.Plugins.DynamicMonuments+CustomMonument x) [0x00016] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonumentsExtensionMethods.ExtensionMethods.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) [0x00010] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonuments+CustomMonument.GetMonumentByEntity (BaseEntity entity) [0x0000d] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonuments.OnEntityTakeDamage (LootContainer lootContainer, HitInfo info) [0x0002e] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.DynamicMonuments.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0070f] in <a85c14e8e03749f984c273cc26ceeba5>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <8cb2d664f1574f2b96d53f1c1869d96a>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <8cb2d664f1574f2b96d53f1c1869d96a>:0 Its a

Changed Status from Pending to Work in Progress