diff --git a/lib/file.php b/lib/file.php
index 2532c2ab..02028164 100644
--- a/lib/file.php
+++ b/lib/file.php
@@ -153,6 +153,9 @@ class File {
 			$rootLinkItem = \OCP\Share::resolveReShare($this->sharing[0]);
 			if (isset($rootLinkItem['uid_owner'])){
 				$owner = $rootLinkItem['uid_owner'];
+				\OCP\JSON::checkUserExists($rootLinkItem['uid_owner']);
+				\OC_Util::tearDownFS();
+				\OC_Util::setupFS($rootLinkItem['uid_owner']);
 			} else {
 				throw new \Exception($this->fileId . ' is a broken share');
 			}