Update HashtagFollow model

app/HashtagFollow.php

@@ -6,5 +6,9 @@ use Illuminate\Database\Eloquent\Model;
 
 class HashtagFollow extends Model
 {
-    //
+    protected $fillable = [
+    	'user_id',
+    	'profile_id',
+    	'hashtag_id'
+    ];
 }