diff --git a/etc/sql/pgsql-basesystem.sql b/etc/sql/pgsql-basesystem.sql
index 86818fa6..69b85187 100644
--- a/etc/sql/pgsql-basesystem.sql
+++ b/etc/sql/pgsql-basesystem.sql
@@ -15,6 +15,9 @@ CREATE TABLE suser (
 	status        BOOL
 ) WITH OIDS;
 
+CREATE UNIQUE INDEX suser_title_uniq_idx ON suser(title);
+CREATE UNIQUE INDEX suser_email_uniq_idx ON suser(lower(email)) WHERE email IS NOT NULL;
+
 CREATE TABLE sgroup (
 	id            SERIAL PRIMARY KEY,
 	sys_owner     INT4 DEFAULT NULL REFERENCES suser ON DELETE SET NULL ON UPDATE CASCADE,
diff --git a/lib/Database/database.class.inc b/lib/Database/database.class.inc
index 387eb5f1..6064aa43 100644
--- a/lib/Database/database.class.inc
+++ b/lib/Database/database.class.inc
@@ -781,8 +781,8 @@ class PXDatabase extends DatabaseAdapter implements DatabaseInterface
 			$newId = $this->InsertObject($format->id, $dbFields, $dbValues, false);
 			if ($newId < 0) {
 				$errString = $this->GetError();
-				$audit->error($errString, $format->id . '/' . getFromArray($object, 'parent'));
 				$this->transactionRollback();
+				$audit->error($errString, $format->id . '/' . getFromArray($object, 'parent'));
 				$this->FatalError($errString);
 			}
 
@@ -1095,9 +1095,10 @@ class PXDatabase extends DatabaseAdapter implements DatabaseInterface
 			$result = $this->UpdateObjectById($format->id, $object['id'], $dbFields, $dbValues, false);
 
 			if ($result < 0) {
-				$audit->error($this->GetError(), $format->id . '/' . $object['id']);
+				$errString = $this->GetError();
 				$this->transactionRollback();
-				$this->FatalError($this->GetError());
+				$audit->error($errString, $format->id . '/' . $object['id']);
+				$this->FatalError($errString);
 			}
 			if ($format->struct == 'tree' && isset($objectInDB['parent']) && $objectInDB['parent'] != $object['parent']) {
 				$childs = $this->getObjectsByParent($format, NULL, $objectInDB['parent'], DB_SELECT_TREE);
diff --git a/lib/Logger/nllogger.class.inc b/lib/Logger/nllogger.class.inc
index 9f093e4f..0225878b 100644
--- a/lib/Logger/nllogger.class.inc
+++ b/lib/Logger/nllogger.class.inc
@@ -285,6 +285,7 @@ class FileAppender extends Appender
  */
 class SQLAppender extends Appender
 {
+    /** @var PXDatabase */
     public $db;
 
     public function __construct($name)