diff --git a/mailpoet/lib/Entities/ScheduledTaskEntity.php b/mailpoet/lib/Entities/ScheduledTaskEntity.php
index 3d141223b4..c16b16a07e 100644
--- a/mailpoet/lib/Entities/ScheduledTaskEntity.php
+++ b/mailpoet/lib/Entities/ScheduledTaskEntity.php
@@ -95,15 +95,8 @@ class ScheduledTaskEntity {
    */
   private $sendingQueue;
 
-  /**
-   * @ORM\OneToMany(targetEntity="MailPoet\Entities\ScheduledTaskSubscriberEntity", mappedBy="task", orphanRemoval=true)
-   * @var Collection<int, ScheduledTaskSubscriberEntity>
-   */
-  private $scheduledTaskSubscribers;
-
   public function __construct() {
     $this->subscribers = new ArrayCollection();
-    $this->scheduledTaskSubscribers = new ArrayCollection();
   }
 
   /**
diff --git a/mailpoet/lib/Entities/ScheduledTaskSubscriberEntity.php b/mailpoet/lib/Entities/ScheduledTaskSubscriberEntity.php
index 2ef4ec75e2..268b34a4e2 100644
--- a/mailpoet/lib/Entities/ScheduledTaskSubscriberEntity.php
+++ b/mailpoet/lib/Entities/ScheduledTaskSubscriberEntity.php
@@ -45,7 +45,7 @@ class ScheduledTaskSubscriberEntity {
   private $error;
 
   /**
-   * @ORM\Id @ORM\ManyToOne(targetEntity="MailPoet\Entities\ScheduledTaskEntity", inversedBy="scheduledTaskSubscribers")
+   * @ORM\Id @ORM\ManyToOne(targetEntity="MailPoet\Entities\ScheduledTaskEntity", inversedBy="subscribers")
    * @var ScheduledTaskEntity|null
    */
   private $task;