player gets admin mode

hello, im having a problem. affter a player got banned from arkan.
he joined to the server and got admin permissions. 
checked consoled and saw this.

 

 Failed to call hook 'OnPlayerBanned' on plugin 'AdminToggle v3.1.15' (NullReferenceException: Object reference not set to an instance of an object)
at XLIB.PLAYER+AuthLevel.Set (BasePlayer player, XLIB.PLAYER+AuthLevel+LevelType type) [0x0003f] in <62569efd7c4f48c2acde0237f837db8e>:0
at Oxide.Plugins.AdminToggle.HandleBan (System.UInt64 id, System.String reason) [0x00074] in <62569efd7c4f48c2acde0237f837db8e>:0
at Oxide.Plugins.AdminToggle.OnPlayerBanned (System.String name, System.UInt64 id, System.String address, System.String reason) [0x00000] in <62569efd7c4f48c2acde0237f837db8e>:0
at Oxide.Plugins.AdminToggle.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x006b8] in <62569efd7c4f48c2acde0237f837db8e>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <795304323ac74a298b8ed190a1dfa739>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0

12/09 20:51:31 | Failed to call hook 'API_ArkanOnAimbotViolation' on plugin 'ArkanAutoBan v1.0.0' (ArgumentException: An item with the same key has already been added. Key: 76561199527951866)
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000dd] in <f98723dd4586469db5213ec59da723ca>:0
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <f98723dd4586469db5213ec59

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Try setting this to false

"Ignore Server Violations (Bans, Kicks Etc) (Recommended to keep true)": false,

Changed Status from Pending to Work in Progress

Resolved?

yes, at the moment no more issues . thanks.

Changed Status from Work in Progress to Closed