diff --git a/deployment_files/global/v1.0demo/software/config/versions.yaml b/deployment_files/global/v1.0demo/software/config/versions.yaml
index 177a4c19..07bb617d 100644
--- a/deployment_files/global/v1.0demo/software/config/versions.yaml
+++ b/deployment_files/global/v1.0demo/software/config/versions.yaml
@@ -655,6 +655,7 @@ data:
         dep_check: *dep_check
       mariadb:
         mariadb: *mariadb_db
+        # NOTE: nginx-ingress-controller > 0.9.0 is not compatible with MariaDB.
         ingress: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.9.0
         error_pages: *ingress_error_pages
         prometheus_create_mysql_user: *mariadb_db