diff --git a/playbooks/roles/gerrit/templates/secure.config.j2 b/playbooks/roles/gerrit/templates/secure.config.j2
index 88d7a64742..dc0ed39b94 100644
--- a/playbooks/roles/gerrit/templates/secure.config.j2
+++ b/playbooks/roles/gerrit/templates/secure.config.j2
@@ -4,10 +4,7 @@
 {% endif %}
 {% if gerrit_reviewdb_database_type == 'mariadb_container' %}
 [accountPatchReviewDb]
-# NOTE(ianw) 2021-07-19 : the mariadb connector throws errors because
-# it doesn't seem to handle duplicate key detection.  Investigation
-# upstream TBC.
-	url = jdbc:mysql://127.0.0.1:3306/{{ gerrit_reviewdb_mariadb_dbname }}?sessionVariables=character_set_client=utf8,character_set_results=utf8,character_set_connection=utf8,collation_connection=utf8_unicode_ci,collation_database=utf8_unicode_ci,collation_server=utf8_unicode_ci&user={{ gerrit_reviewdb_mariadb_username }}&password={{ gerrit_reviewdb_mariadb_password }}
+	url = jdbc:mariadb://127.0.0.1:3306/{{ gerrit_reviewdb_mariadb_dbname }}?sessionVariables=character_set_client=utf8,character_set_results=utf8,character_set_connection=utf8,collation_connection=utf8_unicode_ci,collation_database=utf8_unicode_ci,collation_server=utf8_unicode_ci&user={{ gerrit_reviewdb_mariadb_username }}&password={{ gerrit_reviewdb_mariadb_password }}
 {% endif %}
 [auth]
 	registerEmailPrivateKey = {{ gerrit_email_private_key }}