diff --git a/src/Worker/APDelivery.php b/src/Worker/APDelivery.php
index 609bb8888..92767a105 100644
--- a/src/Worker/APDelivery.php
+++ b/src/Worker/APDelivery.php
@@ -68,13 +68,14 @@ class APDelivery
 			}
 		}
 
-		// This should never fail and is temporariy (until the move to )
+		// This should never fail and is temporariy (until the move to the "post" structure)
 		$item = Item::selectFirst(['uri-id'], ['id' => $target_id]);
+		$uriid = $item['uri-id'] ?? 0;
 
 		if (!$success && !Worker::defer() && in_array($cmd, [Delivery::POST])) {
-			Post\DeliveryData::incrementQueueFailed($item['uri-id']);
+			Post\DeliveryData::incrementQueueFailed($uriid);
 		} elseif ($success && in_array($cmd, [Delivery::POST])) {
-			Post\DeliveryData::incrementQueueDone($item['uri-id'], Post\DeliveryData::ACTIVITYPUB);
+			Post\DeliveryData::incrementQueueDone($uriid, Post\DeliveryData::ACTIVITYPUB);
 		}
 	}
 }
diff --git a/static/dbstructure.config.php b/static/dbstructure.config.php
index 833d809e7..364e2a83c 100755
--- a/static/dbstructure.config.php
+++ b/static/dbstructure.config.php
@@ -936,7 +936,7 @@ return [
 			"id" => ["type" => "int unsigned", "not null" => "1", "extra" => "auto_increment", "primary" => "1", "comment" => "sequential ID"],
 			"notify-id" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "relation" => ["notify" => "id"], "comment" => ""],
 			"master-parent-item" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "relation" => ["item" => "id"], "comment" => ""],
-			"master-parent-uri-id" => ["type" => "int unsigned", "foreign" => ["item-uri" => "id"], "comment" => "Item-uri id of the parent of the related post"],
+			"master-parent-uri-id" => ["type" => "int unsigned", "relation" => ["item-uri" => "id"], "comment" => "Item-uri id of the parent of the related post"],
 			"parent-item" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "comment" => ""],
 			"receiver-uid" => ["type" => "mediumint unsigned", "not null" => "1", "default" => "0", "relation" => ["user" => "uid"],
 				"comment" => "User id"],