diff --git a/apps/dav/appinfo/info.xml b/apps/dav/appinfo/info.xml
index 3d3bff52ea126..61e7444afc505 100644
--- a/apps/dav/appinfo/info.xml
+++ b/apps/dav/appinfo/info.xml
@@ -5,7 +5,7 @@
 	<description>WebDAV endpoint</description>
 	<licence>AGPL</licence>
 	<author>owncloud.org</author>
-	<version>1.4.1</version>
+	<version>1.4.2</version>
 	<default_enable/>
 	<types>
 		<filesystem/>
diff --git a/apps/dav/lib/Migration/Version1004001Date20170825134824.php b/apps/dav/lib/Migration/Version1004Date20170825134824.php
similarity index 98%
rename from apps/dav/lib/Migration/Version1004001Date20170825134824.php
rename to apps/dav/lib/Migration/Version1004Date20170825134824.php
index a2a85d1e5b0e6..b99f51322c562 100644
--- a/apps/dav/lib/Migration/Version1004001Date20170825134824.php
+++ b/apps/dav/lib/Migration/Version1004Date20170825134824.php
@@ -26,7 +26,7 @@
 use OCP\Migration\SimpleMigrationStep;
 use OCP\Migration\IOutput;
 
-class Version1004001Date20170825134824 extends SimpleMigrationStep {
+class Version1004Date20170825134824 extends SimpleMigrationStep {
 	/**
 	 * @param IOutput $output
 	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
@@ -44,7 +44,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 				'autoincrement' => true,
 				'notnull' => true,
 				'length' => 11,
-				'unsgined' => true,
+				'unsigned' => true,
 			]);
 			$table->addColumn('principaluri', 'string', [
 				'notnull' => false,
@@ -143,7 +143,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 				'autoincrement' => true,
 				'notnull' => true,
 				'length' => 11,
-				'unsgined' => true,
+				'unsigned' => true,
 			]);
 			$table->addColumn('calendardata', 'blob', [
 				'notnull' => false,
@@ -256,7 +256,7 @@ public function changeSchema(IOutput $output, \Closure $schemaClosure, array $op
 				'autoincrement' => true,
 				'notnull' => true,
 				'length' => 11,
-				'unsgiend' => true,
+				'unsigned' => true,
 			]);
 			$table->addColumn('uri', 'string', [
 				'notnull' => false,
diff --git a/apps/dav/lib/Migration/Version1004Date20170919104507.php b/apps/dav/lib/Migration/Version1004Date20170919104507.php
new file mode 100644
index 0000000000000..3a0fb1ab9048d
--- /dev/null
+++ b/apps/dav/lib/Migration/Version1004Date20170919104507.php
@@ -0,0 +1,36 @@
+<?php
+namespace OCA\DAV\Migration;
+
+use Doctrine\DBAL\Schema\Schema;
+use OCP\Migration\SimpleMigrationStep;
+use OCP\Migration\IOutput;
+
+class Version1004Date20170919104507 extends SimpleMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param array $options
+	 * @return null|Schema
+	 * @since 13.0.0
+	 */
+	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
+		/** @var Schema $schema */
+		$schema = $schemaClosure();
+
+		$table = $schema->getTable('addressbooks');
+		$column = $table->getColumn('id');
+		$column->setUnsigned(true);
+
+		$table = $schema->getTable('calendarobjects');
+		$column = $table->getColumn('id');
+		$column->setUnsigned(true);
+
+		$table = $schema->getTable('calendarchanges');
+		$column = $table->getColumn('id');
+		$column->setUnsigned(true);
+
+		return $schema;
+	}
+
+}