Failed to call hook 'OnServerInitialized' on plugin 'UpdaterNpcSpawn v1.0.0'

Failed to call hook 'OnServerInitialized' on plugin 'UpdaterNpcSpawn v1.0.0' (IOException: Cannot create a file when that file already exists.)
  at System.IO.FileSystem.MoveDirectory (System.String sourceFullPath, System.String destFullPath) [0x00040] in <f98723dd4586469db5213ec59da723ca>:0 
  at System.IO.Directory.Move (System.String sourceDirName, System.String destDirName) [0x000ed] in <f98723dd4586469db5213ec59da723ca>:0 
  at Oxide.Plugins.UpdaterNpcSpawn.ReadAndRenameConfigOldNpcSpawn () [0x0091d] in <fdbbd1f9c3544b53aefec999bd6e2558>:0 
  at Oxide.Plugins.UpdaterNpcSpawn.OnServerInitialized () [0x0000a] in <fdbbd1f9c3544b53aefec999bd6e2558>:0 
  at Oxide.Plugins.UpdaterNpcSpawn.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00072] in <fdbbd1f9c3544b53aefec999bd6e2558>: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 <15f61ddda771464d8246ebdce8ff4811>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <15f61ddda771464d8246ebdce8ff4811>:0