diff --git a/api/setup/setup.inc.php b/api/setup/setup.inc.php
index e4f80fac7a..310d9e1822 100644
--- a/api/setup/setup.inc.php
+++ b/api/setup/setup.inc.php
@@ -11,7 +11,7 @@
 /* Basic information about this app */
 $setup_info['api']['name']      = 'api';
 $setup_info['api']['title']     = 'EGroupware API';
-$setup_info['api']['version']   = '19.1.002';
+$setup_info['api']['version']   = '19.1.003';
 $setup_info['api']['versions']['current_header'] = '1.29';
 // maintenance release in sync with changelog in doc/rpm-build/debian.changes
 $setup_info['api']['versions']['maintenance_release'] = '19.1.20190925';
@@ -130,4 +130,3 @@ $setup_info['groupdav']['author'] = $setup_info['groupdav']['maintainer'] = arra
 $setup_info['groupdav']['license'] = 'GPL';
 $setup_info['groupdav']['hooks']['preferences']	= 'EGroupware\\Api\\CalDAV\\Hooks::menus';
 $setup_info['groupdav']['hooks']['settings']	= 'EGroupware\\Api\\CalDAV\\Hooks::settings';
-
diff --git a/api/setup/tables_current.inc.php b/api/setup/tables_current.inc.php
index e365a59c5a..69dc024367 100644
--- a/api/setup/tables_current.inc.php
+++ b/api/setup/tables_current.inc.php
@@ -191,7 +191,7 @@ $phpgw_baseline = array(
 		),
 		'pk' => array('link_id'),
 		'fk' => array(),
-		'ix' => array('deleted',array('link_app1','link_id1','link_lastmod'),array('link_app2','link_id2','link_lastmod')),
+		'ix' => array('deleted',array('link_app1','link_id1','link_lastmod'),array('link_app2','link_id2','link_lastmod'),array('link_app1','link_app2','link_id1','link_id2')),
 		'uc' => array()
 	),
 	'egw_addressbook' => array(
diff --git a/api/setup/tables_update.inc.php b/api/setup/tables_update.inc.php
index 53efbddcf3..645ee2559f 100644
--- a/api/setup/tables_update.inc.php
+++ b/api/setup/tables_update.inc.php
@@ -692,3 +692,15 @@ function api_upgrade19_1_001()
 	}
 	return $GLOBALS['setup_info']['api']['currentver'] = '19.1.002';
 }
+
+/**
+ * Index to speed up ProjectManager link-/sub-project-queries
+ *
+ * @return string
+ */
+function api_upgrade19_1_002()
+{
+	$GLOBALS['egw_setup']->oProc->CreateIndex('egw_links', array('link_app1','link_app2','link_id1','link_id2'));
+
+	return $GLOBALS['setup_info']['api']['currentver'] = '19.1.003';
+}