diff --git a/mariadb/metadata.yml b/mariadb/metadata.yml
index 24c018e..676e493 100644
--- a/mariadb/metadata.yml
+++ b/mariadb/metadata.yml
@@ -16,7 +16,7 @@ uses:
       schedule: "31 * * * *"  ## schedule backup every hour
   ## This one is useful only if previous relation is used
   backup:
-    constraint: optional
+    constraint: recommended
     auto: pair
     solves:
       backup: "Automatic regular backups of dumps"