diff --git a/src/Database/Database.php b/src/Database/Database.php
index cd2803c0fc..fde5bd9f10 100644
--- a/src/Database/Database.php
+++ b/src/Database/Database.php
@@ -68,7 +68,7 @@ class Database
 	protected $connection;
 	protected $driver = '';
 	protected $pdo_emulate_prepares = false;
-	private $error          = false;
+	private $error          = '';
 	private $errorno        = 0;
 	private $affected_rows  = 0;
 	protected $in_transaction = false;
@@ -558,8 +558,8 @@ class Database
 				if (count($args) == 0) {
 					if (!$retval = $this->connection->query($this->replaceParameters($sql, $args))) {
 						$errorInfo     = $this->connection->errorInfo();
-						$this->error   = $errorInfo[2];
-						$this->errorno = (int) $errorInfo[1];
+						$this->error   = (string)$errorInfo[2];
+						$this->errorno = (int)$errorInfo[1];
 						$retval        = false;
 						$is_error      = true;
 						break;
@@ -571,8 +571,8 @@ class Database
 				/** @var $stmt mysqli_stmt|PDOStatement */
 				if (!$stmt = $this->connection->prepare($sql)) {
 					$errorInfo     = $this->connection->errorInfo();
-					$this->error   = $errorInfo[2];
-					$this->errorno = (int) $errorInfo[1];
+					$this->error   = (string)$errorInfo[2];
+					$this->errorno = (int)$errorInfo[1];
 					$retval        = false;
 					$is_error      = true;
 					break;
@@ -591,8 +591,8 @@ class Database
 
 				if (!$stmt->execute()) {
 					$errorInfo     = $stmt->errorInfo();
-					$this->error   = $errorInfo[2];
-					$this->errorno = (int) $errorInfo[1];
+					$this->error   = (string)$errorInfo[2];
+					$this->errorno = (int)$errorInfo[1];
 					$retval        = false;
 					$is_error      = true;
 				} else {
@@ -610,8 +610,8 @@ class Database
 				if (!$can_be_prepared || (count($args) == 0)) {
 					$retval = $this->connection->query($this->replaceParameters($sql, $args));
 					if ($this->connection->errno) {
-						$this->error   = $this->connection->error;
-						$this->errorno = $this->connection->errno;
+						$this->error   = (string)$this->connection->error;
+						$this->errorno = (int)$this->connection->errno;
 						$retval        = false;
 						$is_error      = true;
 					} else {
@@ -627,8 +627,8 @@ class Database
 				$stmt = $this->connection->stmt_init();
 
 				if (!$stmt->prepare($sql)) {
-					$this->error   = $stmt->error;
-					$this->errorno = $stmt->errno;
+					$this->error   = (string)$stmt->error;
+					$this->errorno = (int)$stmt->errno;
 					$retval        = false;
 					$is_error      = true;
 					break;
@@ -658,8 +658,8 @@ class Database
 				}
 
 				if (!$stmt->execute()) {
-					$this->error   = $this->connection->error;
-					$this->errorno = $this->connection->errno;
+					$this->error   = (string)$this->connection->error;
+					$this->errorno = (int)$this->connection->errno;
 					$retval        = false;
 					$is_error      = true;
 				} else {
@@ -726,8 +726,8 @@ class Database
 				}
 			}
 
-			$this->error   = $error;
-			$this->errorno = (int) $errorno;
+			$this->error   = (string)$error;
+			$this->errorno = (int)$errorno;
 		}
 
 		$this->profiler->stopRecording();
diff --git a/src/Model/FContact.php b/src/Model/FContact.php
index 62e609fbee..8bc696a466 100644
--- a/src/Model/FContact.php
+++ b/src/Model/FContact.php
@@ -24,6 +24,7 @@ namespace Friendica\Model;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\Database\DBA;
+use Friendica\DI;
 use Friendica\Network\Probe;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Strings;
@@ -125,6 +126,7 @@ class FContact
 
 		$condition = ['url' => $arr['url'], 'network' => $arr['network']];
 
+		$fields = DI::dbaDefinition()->truncateFieldsForTable('fcontact', $fields);
 		DBA::update('fcontact', $fields, $condition, true);
 	}
 
diff --git a/src/Model/Item.php b/src/Model/Item.php
index 741594f228..598fca8407 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -33,7 +33,6 @@ use Friendica\Model\Tag;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
 use Friendica\DI;
-use Friendica\Model\Post;
 use Friendica\Protocol\Activity;
 use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\Diaspora;
@@ -2545,7 +2544,7 @@ class Item
 		}
 
 		// Retrieve the current logged in user's public contact
-		$author_id = Contact::getIdForURL($owner['url']);
+		$author_id = Contact::getPublicIdByUserId($uid);
 		if (empty($author_id)) {
 			Logger::info('Empty public contact');
 			return false;
@@ -2652,7 +2651,7 @@ class Item
 		$new_item = [
 			'guid'          => System::createUUID(),
 			'uri'           => self::newURI(),
-			'uid'           => $item['uid'],
+			'uid'           => $uid,
 			'contact-id'    => $owner['id'],
 			'wall'          => $item['wall'],
 			'origin'        => 1,
@@ -2680,17 +2679,13 @@ class Item
 			$new_item['diaspora_signed_text'] = json_encode($signed);
 		}
 
-		$new_item_id = self::insert($new_item);
+		self::insert($new_item, true);
 
 		// If the parent item isn't visible then set it to visible
+		// @todo Check if this is still needed
 		if (!$item['visible']) {
 			self::update(['visible' => true], ['id' => $item['id']]);
 		}
-
-		$new_item['id'] = $new_item_id;
-
-		Hook::callAll('post_local_end', $new_item);
-
 		return true;
 	}
 
diff --git a/src/Module/Item/Activity.php b/src/Module/Item/Activity.php
index 648ebfa08c..9f0b917869 100644
--- a/src/Module/Item/Activity.php
+++ b/src/Module/Item/Activity.php
@@ -51,9 +51,9 @@ class Activity extends BaseModule
 		$itemId =  $this->parameters['id'];
 
 		if (in_array($verb, ['announce', 'unannounce'])) {
-			$item = Post::selectFirst(['network', 'uri-id', 'uid'], ['id' => $itemId]);
+			$item = Post::selectFirst(['network', 'uri-id'], ['id' => $itemId, 'uid' => [local_user(), 0]]);
 			if ($item['network'] == Protocol::DIASPORA) {
-				Diaspora::performReshare($item['uri-id'], $item['uid']);
+				Diaspora::performReshare($item['uri-id'], local_user());
 			}
 		}
 
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 61f625f597..668b8a5b89 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -228,7 +228,7 @@ class Processor
 	{
 		$item = Post::selectFirst(['uri', 'uri-id', 'thr-parent', 'gravity', 'post-type', 'private'], ['uri' => $activity['id']]);
 		if (!DBA::isResult($item)) {
-			Logger::warning('No existing item, item will be created', ['uri' => $activity['id']]);
+			Logger::notice('No existing item, item will be created', ['uri' => $activity['id']]);
 			$item = self::createItem($activity, false);
 			if (empty($item)) {
 				Queue::remove($activity);