diff --git a/phpgwapi/inc/class.schema_proc.inc.php b/phpgwapi/inc/class.schema_proc.inc.php
index 8d393e01d1..0fcf254f89 100644
--- a/phpgwapi/inc/class.schema_proc.inc.php
+++ b/phpgwapi/inc/class.schema_proc.inc.php
@@ -265,7 +265,7 @@
 
 			$Ok = $this->RenameTable($sTableName,$tmp_name) &&
 				$this->CreateTable($sTableName,$aTableDef) &&
-				$this->m_odb->query("INSERT INTO $sTableName SELECT $select FROM $tmp_name",__LINE__,__FILE__);
+				$this->m_odb->query("INSERT INTO $sTableName SELECT DISTINCT $select FROM $tmp_name",__LINE__,__FILE__);
 
 			if (!$Ok)
 			{