ArgumentException: An item with the same key has already been added. Key: 0
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000c1] in <567df3e0919241ba98db88bec4c6696f>:0
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <567df3e0919241ba98db88bec4c6696f>:0
at SleeperVolume.Read (System.IO.BinaryReader _br) [0x00295] in <d7c95f421d354b5e851d6f3126817769>:0
at World.ReadSleeperVolumes (System.IO.BinaryReader _br) [0x00021] in <d7c95f421d354b5e851d6f3126817769>:0
at World+<LoadWorld>d__62.MoveNext () [0x003e4] in <d7c95f421d354b5e851d6f3126817769>:0
at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00027] in <5e1dfb686eb345078a588df96401afcc>:0
UnityEngine.MonoBehaviour:StartCoroutineManaged2(IEnumerator)