I'm trying to diagnose some crash issues, and I'm coming across this message. Admittedly, I have no idea which mod is causing it, but the only colonist that I've left 'unburied' is the t1 that i upgraded to a t4 and disassembled the old body.

Exception processing alert RimWorld.Alert_ColonistLeftUnburied: System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.Alert_ColonistLeftUnburied.IsCorpseOfColonist (Verse.Corpse corpse) [0x00006] in <36108d57f84d49cabdae818c2a53fc38>:0
at RimWorld.Alert_ColonistLeftUnburied.get_UnburiedColonistCorpses () [0x00051] in <36108d57f84d49cabdae818c2a53fc38>:0
at RimWorld.Alert_ColonistLeftUnburied.GetReport () [0x00000] in <36108d57f84d49cabdae818c2a53fc38>:0
at RimWorld.Alert.Recalculate () [0x00000] in <36108d57f84d49cabdae818c2a53fc38>:0
at RimWorld.AlertsReadout.CheckAddOrRemoveAlert (RimWorld.Alert alert, System.Boolean forceRemove) [0x00000] in <36108d57f84d49cabdae818c2a53fc38>:0
Verse.Log:Error(String, Boolean)
Verse.Log:ErrorOnce(String, Int32, Boolean)
RimWorld.AlertsReadout:CheckAddOrRemoveAlert(Alert, Boolean)
RimWorld.AlertsReadout:AlertsReadoutUpdate()
RimWorld.UIRoot_Play:UIRootUpdate()
Verse.Root:DMD<DMD<Update_Patch1>?2127603712::Update_Patch1>(Root)
Verse.Root_Play:DMD<DMD<Update_Patch1>?1534502912::Update_Patch1>(Root_Play)


Any ideas?