Is there way to fix this please 
Failed to call hook 'OnRocketLaunched' on plugin 'FirearmModifier v1.6.0' (KeyNotFoundException: The given key was not present in the dictionary.) at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in :0 at Oxide.Plugins.FirearmModifier.OnRocketLaunched (BasePlayer player, BaseEntity entity) [0x00079] in :0 at Oxide.Plugins.FirearmModifier.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00230] in :0 at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in :0 at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0 at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0