diff --git a/database.sql b/database.sql
index 417eddfcde..40abb7f056 100644
--- a/database.sql
+++ b/database.sql
@@ -1159,7 +1159,7 @@ CREATE TABLE IF NOT EXISTS `post-collection` (
 	 INDEX `type` (`type`),
 	 INDEX `author-id` (`author-id`),
 	FOREIGN KEY (`uri-id`) REFERENCES `item-uri` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE,
-	FOREIGN KEY (`author-id`) REFERENCES `contact` (`id`) ON UPDATE RESTRICT ON DELETE RESTRICT
+	FOREIGN KEY (`author-id`) REFERENCES `contact` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE
 ) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Collection of posts';
 
 --
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 5413e32841..61f625f597 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -759,7 +759,7 @@ class Processor
 	public static function createEvent(array $activity, array $item): int
 	{
 		$event['summary']   = HTML::toBBCode($activity['name'] ?: $activity['summary']);
-		$event['desc']      = HTML::toBBCode($activity['content']);
+		$event['desc']      = HTML::toBBCode($activity['content'] ?? '');
 		if (!empty($activity['start-time'])) {
 			$event['start']  = DateTimeFormat::utc($activity['start-time']);
 		}
diff --git a/static/dbstructure.config.php b/static/dbstructure.config.php
index fc5be58dd8..81f03fbf31 100644
--- a/static/dbstructure.config.php
+++ b/static/dbstructure.config.php
@@ -1188,7 +1188,7 @@ return [
 		"fields" => [
 			"uri-id" => ["type" => "int unsigned", "not null" => "1", "primary" => "1", "foreign" => ["item-uri" => "id"], "comment" => "Id of the item-uri table entry that contains the item uri"],
 			"type" => ["type" => "tinyint unsigned", "not null" => "1", "default" => "0", "primary" => "1", "comment" => "0 - Featured"],
-			"author-id" => ["type" => "int unsigned", "foreign" => ["contact" => "id", "on delete" => "restrict"], "comment" => "Author of the featured post"],
+			"author-id" => ["type" => "int unsigned", "foreign" => ["contact" => "id"], "comment" => "Author of the featured post"],
 		],
 		"indexes" => [
 			"PRIMARY" => ["uri-id", "type"],