diff --git a/.config/example.yml b/.config/example.yml
index 48b1a0fd1..2591066da 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -132,6 +132,9 @@ drive:
 # ulid ... Millisecond accuracy
 # objectid ... This is left for backward compatibility
 
+# ONCE YOU HAVE STARTED THE INSTANCE, DO NOT CHANGE THE
+# ID SETTINGS AFTER THAT!
+
 id: 'aid'
 
 #   ┌─────────────────────┐