Update MentionPipeline

app/Jobs/MentionPipeline/MentionPipeline.php

@@ -18,6 +18,13 @@ class MentionPipeline implements ShouldQueue
     protected $status;
     protected $mention;
 
+    /**
+     * Delete the job if its models no longer exist.
+     *
+     * @var bool
+     */
+    public $deleteWhenMissingModels = true;
+
     /**
      * Create a new job instance.
      *