diff --git a/debian/gitlab.maintscript b/debian/gitlab.maintscript
index 95fa6b33a1..6c9a669667 100644
--- a/debian/gitlab.maintscript
+++ b/debian/gitlab.maintscript
@@ -706,3 +706,5 @@ rm_conffile /etc/gitlab/initializers/active_record_ping.rb 15.2.2+ds1-3 gitlab
 rm_conffile /etc/gitlab/initializers/asciidoctor_patch.rb 15.2.2+ds1-3 gitlab
 rm_conffile /etc/gitlab/initializers/graphql.rb 15.2.2+ds1-3 gitlab
 rm_conffile /etc/gitlab/feature_flags/development/performance_bar_stats.yml 15.2.3+ds1-2 gitlab
+rm_conffile /etc/gitlab/feature_flags/development/detect_cross_database_modification.yml 15.3.4+ds1-1 gitlab
+rm_conffile /etc/gitlab/feature_flags/development/query_analyzer_gitlab_schema_metrics.yml 15.3.4+ds1-1 gitlab