diff --git a/auth/mnet/classes/task/cron_task.php b/auth/mnet/classes/task/cron_task.php
index dbd8e177dbc..a7bc684cd77 100644
--- a/auth/mnet/classes/task/cron_task.php
+++ b/auth/mnet/classes/task/cron_task.php
@@ -42,11 +42,6 @@ class cron_task extends \core\task\scheduled_task {
         require_once($CFG->dirroot . '/auth/mnet/auth.php');
         $mnetplugin = new \auth_plugin_mnet();
         $mnetplugin->keepalive_client();
-
-        $random100 = rand(0,100);
-        if ($random100 < 10) {
-            $longtime = time() - DAYSECS;
-            $DB->delete_records_select('mnet_session', "expires < ?", [$longtime]);
-        }
+        $DB->delete_records_select('mnet_session', "expires < ?", [time() - DAYSECS]);
     }
 }
diff --git a/auth/mnet/db/tasks.php b/auth/mnet/db/tasks.php
index e85dc3d6619..37722c085dd 100644
--- a/auth/mnet/db/tasks.php
+++ b/auth/mnet/db/tasks.php
@@ -25,7 +25,7 @@ $tasks = array(
     array(
         'classname' => '\auth_mnet\task\cron_task',
         'blocking' => 0,
-        'minute' => '*',
+        'minute' => '*/10',
         'hour' => '*',
         'day' => '*',
         'month' => '*',
diff --git a/auth/mnet/version.php b/auth/mnet/version.php
index b7fdadaa0a8..41884e9dd03 100644
--- a/auth/mnet/version.php
+++ b/auth/mnet/version.php
@@ -24,6 +24,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2021052500;        // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2021071200;        // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2021052500;        // Requires this Moodle version.
 $plugin->component = 'auth_mnet';       // Full name of the plugin (used for diagnostics)