diff --git a/lib/Config/Populator.php b/lib/Config/Populator.php
index 130de44cab..0b6a2fa3e8 100644
--- a/lib/Config/Populator.php
+++ b/lib/Config/Populator.php
@@ -623,11 +623,11 @@ class Populator {
 
   private function updateLastSubscribedAt() {
     global $wpdb;
-    // perform once for versions below or equal to 3.33.0
-    if (version_compare($this->settings->get('db_version', '3.33.1'), '3.33.0', '>')) {
+    // perform once for versions below or equal to 3.41.2
+    if (version_compare($this->settings->get('db_version', '3.41.3'), '3.41.2', '>')) {
       return false;
     }
-    $query = "UPDATE `%s` SET last_subscribed_at = GREATEST(COALESCE(confirmed_at, 0), COALESCE(created_at, 0)) WHERE status != '%s';";
+    $query = "UPDATE `%s` SET last_subscribed_at = GREATEST(COALESCE(confirmed_at, 0), COALESCE(created_at, 0)) WHERE status != '%s' AND last_subscribed_at IS NULL;";
     $wpdb->query(sprintf(
       $query,
       Subscriber::$_table,