[#2604] Warn that we are destroying an invalid ProcedurePresentation

app/models/assign_to.rb

@@ -17,6 +17,10 @@ class AssignTo < ApplicationRecord
       # a bug somewhere else that we need to fix.
 
       errors = procedure_presentation.errors
+      Raven.capture_message(
+        "Destroying invalid ProcedurePresentation",
+        extra: { procedure_presentation: procedure_presentation.as_json }
+      )
       self.procedure_presentation = nil
       errors
     end