I get this warning when loading in 1.6 with Odyssey: Loaded file (Xenotype) is from version 1.5.4402 rev778, we are running version 1.6.4518 rev84.
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Warning (string)
Verse.ScribeMetaHeaderUtility:LoadGameDataHeader (Verse.ScribeMetaHeaderUtility/ScribeHeaderMode,bool)
XenotypeSpawnControl.ModifiableXenotypeDatabase:TryLoadXenotypeFromFile (string,RimWorld.CustomXenotype&,bool) (at G:/Program Files (x86)/SteamLibrary/steamapps/common/RimWorld/Mods/Xenotype Spawn Control/Source/ModifiableXenotypeDatabase.cs:103)

Just wanted to pass it along in case it will create issues down the line. Thanks!