diff --git a/db/post_migrate/20210207232853_fix_topic_timer_duration_minutes.rb b/db/post_migrate/20210207232853_fix_topic_timer_duration_minutes.rb
new file mode 100644
index 00000000000..a10aa00fc3d
--- /dev/null
+++ b/db/post_migrate/20210207232853_fix_topic_timer_duration_minutes.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+class FixTopicTimerDurationMinutes < ActiveRecord::Migration[6.0]
+  def up
+    DB.exec("UPDATE topic_timers SET duration_minutes = (duration * 60 * 24) WHERE duration_minutes IS NULL AND status_type = 7 AND duration IS NOT NULL")
+    DB.exec("UPDATE topic_timers SET duration_minutes = (duration * 60) WHERE duration_minutes IS NULL AND status_type != 7 AND duration IS NOT NULL")
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end