InvalidOperationException saving lane connection data

[krzychu124]

Other places where ValidateLane is used are ok.

Stacktrace

Info 6,142.5260298: Saving Mod Data.
Error 6,142.5392794: Error occurred while saving data: System.InvalidOperationException: out of sync
  at System.Collections.Generic.Dictionary`2+Enumerator[TrafficManager.Manager.Impl.LaneConnection.LaneEnd,TrafficManager.Manager.Impl.LaneConnection.LaneConnectionData[]].VerifyState () [0x00000] in <filename unknown>:0 
  at System.Collections.Generic.Dictionary`2+Enumerator[TrafficManager.Manager.Impl.LaneConnection.LaneEnd,TrafficManager.Manager.Impl.LaneConnection.LaneConnectionData[]].MoveNext () [0x00000] in <filename unknown>:0 
  at TrafficManager.Manager.Impl.LaneConnection.LaneConnectionSubManager.SaveData (System.Boolean& success) [0x00000] in <filename unknown>:0 
  at TrafficManager.Manager.Impl.LaneConnection.LaneConnectionManager.SaveData (System.Boolean& success) [0x00000] in <filename unknown>:0 
  at TrafficManager.Lifecycle.SerializableDataExtension.Save () [0x00000] in <filename unknown>:0 
   at CSUtil.Commons.Log.LogToFile(System.String log, LogLevel level)
   at CSUtil.Commons.Log.Error(System.String s)
   at TrafficManager.Lifecycle.SerializableDataExtension.Save()
   at TrafficManager.Lifecycle.SerializableDataExtension.OnSaveData()
   at SerializableDataWrapper.OnSaveData()
   at SimulationManager+Data.Serialize(ColossalFramework.IO.DataSerializer s)
   at ColossalFramework.IO.DataSerializer.Serialize(System.IO.Stream stream, Mode mode, UInt32 version, IDataContainer data)
   at LoadingManager+<SaveSimulationData>c__IteratorC.MoveNext()
   at AsyncTask.Execute()
   at SimulationManager.SimulationStep()
   at SimulationManager.SimulationThread()