diff --git a/data/storage/mysql/create_cdrs_tables.sql b/data/storage/mysql/create_cdrs_tables.sql
index b8d2312e8..8765d1d46 100644
--- a/data/storage/mysql/create_cdrs_tables.sql
+++ b/data/storage/mysql/create_cdrs_tables.sql
@@ -34,8 +34,7 @@ CREATE TABLE cdrs_extra (
   tbid int(11) NOT NULL AUTO_INCREMENT,
   cgrid char(40) NOT NULL,
   extra_fields text NOT NULL,
-  PRIMARY KEY (tbid),
-  UNIQUE KEY cgrid (cgrid)
+  PRIMARY KEY (tbid)
 );
 
 --