diff --git a/src/authentic2_gnm/management/commands/sync-cut.py b/src/authentic2_gnm/management/commands/sync-cut.py
index e9b7f1c..3d6e0cd 100644
--- a/src/authentic2_gnm/management/commands/sync-cut.py
+++ b/src/authentic2_gnm/management/commands/sync-cut.py
@@ -50,7 +50,8 @@ class Command(BaseCommand):
         for account in OIDCAccount.objects.filter(sub__in=unknown_uuids):
             if verbose:
                 print('disabling', account.user.email, account.user.ou)
-            account.user.email = account.user.email + '.invalid'
+            account.user.email = account.user.email + '.%s.invalid' % (
+                    datetime.datetime.now().strftime('%Y-%m-%dT%H-%M-%S'))
             account.user.save()
         OIDCAccount.objects.filter(sub__in=unknown_uuids).delete()