diff --git a/apps/files_sharing/appinfo/info.xml b/apps/files_sharing/appinfo/info.xml
index 492b34859b94b..1aa5393ecb914 100644
--- a/apps/files_sharing/appinfo/info.xml
+++ b/apps/files_sharing/appinfo/info.xml
@@ -9,7 +9,7 @@
 Turning the feature off removes shared files and folders on the server for all share recipients, and also on the sync clients and mobile apps. More information is available in the Nextcloud Documentation.
 
 	</description>
-	<version>1.12.1</version>
+	<version>1.12.2</version>
 	<licence>agpl</licence>
 	<author>Michael Gapczynski</author>
 	<author>Bjoern Schiessle</author>
diff --git a/apps/files_sharing/composer/composer/autoload_classmap.php b/apps/files_sharing/composer/composer/autoload_classmap.php
index a29e3879e06e3..dfd6ae75e82fc 100644
--- a/apps/files_sharing/composer/composer/autoload_classmap.php
+++ b/apps/files_sharing/composer/composer/autoload_classmap.php
@@ -63,6 +63,7 @@
     'OCA\\Files_Sharing\\Migration\\SetAcceptedStatus' => $baseDir . '/../lib/Migration/SetAcceptedStatus.php',
     'OCA\\Files_Sharing\\Migration\\SetPasswordColumn' => $baseDir . '/../lib/Migration/SetPasswordColumn.php',
     'OCA\\Files_Sharing\\Migration\\Version11300Date20201120141438' => $baseDir . '/../lib/Migration/Version11300Date20201120141438.php',
+    'OCA\\Files_Sharing\\Migration\\Version21000Date20201223143245' => $baseDir . '/../lib/Migration/Version21000Date20201223143245.php',
     'OCA\\Files_Sharing\\MountProvider' => $baseDir . '/../lib/MountProvider.php',
     'OCA\\Files_Sharing\\Notification\\Listener' => $baseDir . '/../lib/Notification/Listener.php',
     'OCA\\Files_Sharing\\Notification\\Notifier' => $baseDir . '/../lib/Notification/Notifier.php',
diff --git a/apps/files_sharing/composer/composer/autoload_static.php b/apps/files_sharing/composer/composer/autoload_static.php
index 523f2bc194515..b433cb23663a2 100644
--- a/apps/files_sharing/composer/composer/autoload_static.php
+++ b/apps/files_sharing/composer/composer/autoload_static.php
@@ -78,6 +78,7 @@ class ComposerStaticInitFiles_Sharing
         'OCA\\Files_Sharing\\Migration\\SetAcceptedStatus' => __DIR__ . '/..' . '/../lib/Migration/SetAcceptedStatus.php',
         'OCA\\Files_Sharing\\Migration\\SetPasswordColumn' => __DIR__ . '/..' . '/../lib/Migration/SetPasswordColumn.php',
         'OCA\\Files_Sharing\\Migration\\Version11300Date20201120141438' => __DIR__ . '/..' . '/../lib/Migration/Version11300Date20201120141438.php',
+        'OCA\\Files_Sharing\\Migration\\Version21000Date20201223143245' => __DIR__ . '/..' . '/../lib/Migration/Version21000Date20201223143245.php',
         'OCA\\Files_Sharing\\MountProvider' => __DIR__ . '/..' . '/../lib/MountProvider.php',
         'OCA\\Files_Sharing\\Notification\\Listener' => __DIR__ . '/..' . '/../lib/Notification/Listener.php',
         'OCA\\Files_Sharing\\Notification\\Notifier' => __DIR__ . '/..' . '/../lib/Notification/Notifier.php',
diff --git a/apps/files_sharing/lib/Migration/Version11300Date20201120141438.php b/apps/files_sharing/lib/Migration/Version11300Date20201120141438.php
index dfc5bc68a07d7..ff616022be49f 100644
--- a/apps/files_sharing/lib/Migration/Version11300Date20201120141438.php
+++ b/apps/files_sharing/lib/Migration/Version11300Date20201120141438.php
@@ -116,6 +116,21 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 				$remoteIdColumn->setOptions(['length' => 255]);
 				$remoteIdColumn->setDefault('');
 			}
+			if (!$table->hasColumn('parent')) {
+				$table->addColumn('parent', Types::BIGINT, [
+					'notnull' => false,
+					'default' => -1,
+				]);
+			}
+			if (!$table->hasColumn('share_type')) {
+				$table->addColumn('share_type', Types::INTEGER, [
+					'notnull' => false,
+					'length' => 4,
+				]);
+			}
+			if ($table->hasColumn('lastscan')) {
+				$table->dropColumn('lastscan');
+			}
 		}
 
 		return $schema;
diff --git a/apps/files_sharing/lib/Migration/Version21000Date20201223143245.php b/apps/files_sharing/lib/Migration/Version21000Date20201223143245.php
new file mode 100644
index 0000000000000..5dfdb09f1ecb7
--- /dev/null
+++ b/apps/files_sharing/lib/Migration/Version21000Date20201223143245.php
@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020 Vincent Petry <vincent@nextcloud.com>
+ *
+ * @author Vincent Petry <vincent@nextcloud.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+namespace OCA\Files_Sharing\Migration;
+
+use Closure;
+use Doctrine\DBAL\Types\Types;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version21000Date20201223143245 extends SimpleMigrationStep {
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		if ($schema->hasTable('share_external')) {
+			$table = $schema->getTable('share_external');
+			$changed = false;
+			if (!$table->hasColumn('parent')) {
+				$table->addColumn('parent', Types::BIGINT, [
+					'notnull' => false,
+					'default' => -1,
+				]);
+				$changed = true;
+			}
+			if (!$table->hasColumn('share_type')) {
+				$table->addColumn('share_type', Types::INTEGER, [
+					'notnull' => false,
+					'length' => 4,
+				]);
+				$changed = true;
+			}
+			if ($table->hasColumn('lastscan')) {
+				$table->dropColumn('lastscan');
+				$changed = true;
+			}
+
+			if ($changed) {
+				return $schema;
+			}
+		}
+
+		return null;
+	}
+}