diff --git a/hobo/environment/management/commands/cook.py b/hobo/environment/management/commands/cook.py
index 59a5d64..37a9a0a 100644
--- a/hobo/environment/management/commands/cook.py
+++ b/hobo/environment/management/commands/cook.py
@@ -174,7 +174,7 @@ class Command(BaseCommand):
                 must_save = True
         if must_save:
             try:
-                obj.full_clean()
+                obj.full_clean(exclude=['last_operational_success_timestamp', 'last_operational_check_timestamp'])
             except ValidationError as e:
                 raise CommandError(str(e))