Rider replica

Server is currently running version 481207 on Ubuntu 20.04.3 LTS.

While investigating why my Master shard keeps crashing without any error in the log files and works only if I delete the last save file, I found this in a 4 days old log file:

[04:44:37]: [string "scripts/components/rider_replica.lua"]:248: attempt to index field 'inventoryitem' (a nil value)
LUA ERROR stack traceback:
scripts/components/rider_replica.lua:248 in (method) SetSaddle (Lua) <234-255>
   self =
      _isriding = net_bool (0x420f3b10)
      classified = 1211661 - player_classified (valid:true)
      inst = 1211660 - wendy (valid:true)
      _onmounthealthdelta = function - scripts/components/rider_replica.lua:8
   saddle = 1211685 - saddle_basic(LIMBO) (valid:false)
   old = nil
scripts/components/rider.lua:18 in (field) ? (Lua) <17-19>
   self =
      inst = 1211660 - wendy (valid:true)
      target_mount = 1211683 - beefalo(LIMBO) (valid:true)
      _ = table: 0x295cd500
      _onSaddleChanged = function - scripts/components/rider.lua:29
   saddle = 1211685 - saddle_basic(LIMBO) (valid:false)
scripts/class.lua:30 in () ? (Lua) <23-32>
   t = table: 0x295cd4b0
   k = saddle
   v = 1211685 - saddle_basic(LIMBO) (valid:false)
   p = table: 0x5413d570
   old = nil
scripts/components/rider.lua:52 in (method) StartTracking (Lua) <48-54>
   self =
      inst = 1211660 - wendy (valid:true)
      target_mount = 1211683 - beefalo(LIMBO) (valid:true)
      _ = table: 0x295cd500
      _onSaddleChanged = function - scripts/components/rider.lua:29
   mount = 1211683 - beefalo(LIMBO) (valid:true)
scripts/components/rider.lua:149 in (method) Mount (Lua) <67-160>
   self =
      inst = 1211660 - wendy (valid:true)
      target_mount = 1211683 - beefalo(LIMBO) (valid:true)
      _ = table: 0x295cd500
      _onSaddleChanged = function - scripts/components/rider.lua:29
   target = 1211683 - beefalo(LIMBO) (valid:true)
   instant = nil
   rideable = table: 0x3f02cdf0
   saddler = table: 0x4fceb700
   x = 284.21868896484
   y = 0
   z = 519.99572753906
   tx = 283.1867980957
   ty = 4.7898094379661e-08
   tz = 520.47137451172
scripts/actions.lua:2644 in (field) fn (Lua) <2622-2646>
   act = Mount 1211683 - beefalo(LIMBO) (valid:true)
scripts/bufferedaction.lua:25 in (method) Do (Lua) <21-35>
   self (valid:true) =
      action = table: 0x4dfa530
      doer = 1211660 - wendy (valid:true)
      onfail = table: 0x56924d00
      doerownsobject = false
      rotation = 0
      onsuccess = table: 0x56924cb0
      options = table: 0x57f5f9d0
      target = 1211683 - beefalo(LIMBO) (valid:true)
scripts/entityscript.lua:1369 in (method) PerformBufferedAction (Lua) <1356-1379>
   self (valid:true) =
      DynamicShadow = DynamicShadow (0x4aa8fce0)
      inlimbo = false
      GetMoistureRateScale = function - scripts/prefabs/player_common.lua:197
      SetCameraDistance = function - scripts/prefabs/player_common.lua:1143
      ScreenFlash = function - scripts/prefabs/player_common.lua:1205
      skeleton_prefab = skeleton_player
      player_classified = 1211661 - player_classified (valid:true)
      playercolour = table: 0x55e73420
      IsOverheating = function - scripts/prefabs/player_common.lua:167
      Light = Light (0x47798f40)
      _OnDespawn = function - scripts/prefabs/wendy.lua:116
      _isrezattuned = false
      OnRemoveEntity = function - scripts/prefabs/player_common.lua:774
      pendingtasks = table: 0x47798ec0
      ShowHUD = function - scripts/prefabs/player_common.lua:1131
      sg = sg="wilson", state="mount", time=0.00, tags = "nopredict,busy,doing,nomorph,"
      IsHUDVisible = function - scripts/prefabs/player_common.lua:1121
      _bondlevel = net_tinybyte (0x5ac01ba0)
      SetGhostMode = function - scripts/prefabs/player_common.lua:686
      ShowActions = function - scripts/prefabs/player_common.lua:1125
      OnWakeUp = function - scripts/prefabs/player_common.lua:994
      Transform = Transform (0x4df78fb0)
      actionreplica = table: 0x47798fd0
      event_listening = table: 0x3c6dd5f0
      actioncomponents = table: 0x597ba170
      refreshflowertooltip = table: 0x55acec70
      lower_components_shadow = table: 0x597ba070
      GetMaxMoisture = function - scripts/prefabs/player_common.lua:187
      CanUseTouchStone = function - scripts/prefabs/player_common.lua:137
      updatec
[04:44:37]: [string "scripts/components/rider_replica.lua"]:248: attempt to index field 'inventoryitem' (a nil value)
LUA ERROR stack traceback:
    scripts/components/rider_replica.lua:248 in (method) SetSaddle (Lua) <234-255>
    scripts/components/rider.lua:18 in (field) ? (Lua) <17-19>
    scripts/class.lua:30 in () ? (Lua) <23-32>
    scripts/components/rider.lua:52 in (method) StartTracking (Lua) <48-54>
    scripts/components/rider.lua:149 in (method) Mount (Lua) <67-160>
    scripts/actions.lua:2644 in (field) fn (Lua) <2622-2646>
    scripts/bufferedaction.lua:25 in (method) Do (Lua) <21-35>
    scripts/entityscript.lua:1369 in (method) PerformBufferedAction (Lua) <1356-1379>
    scripts/stategraphs/SGwilson.lua:5272 in (field) fn (Lua) <5266-5274>
    scripts/stategraph.lua:572 in (method) UpdateState (Lua) <540-584>
    scripts/stategraph.lua:611 in (method) Update (Lua) <603-631>
    scripts/stategraph.lua:128 in (method) Update (Lua) <109-153>
    scripts/update.lua:239 in () ? (Lua) <170-249>