diff --git a/htdocs/install/mysql/tables/llx_mailing_cibles.key.sql b/htdocs/install/mysql/tables/llx_mailing_cibles.key.sql
index 1f005dff052..721344355f4 100644
--- a/htdocs/install/mysql/tables/llx_mailing_cibles.key.sql
+++ b/htdocs/install/mysql/tables/llx_mailing_cibles.key.sql
@@ -21,5 +21,3 @@ ALTER TABLE llx_mailing_cibles ADD UNIQUE uk_mailing_cibles (fk_mailing, email);
 
 ALTER TABLE llx_mailing_cibles ADD INDEX idx_mailing_cibles_email (email);
 
-ALTER TABLE llx_mailing_cibles ADD INDEX idx_mailing_cibles_fk_mailing_email (fk_mailing,email);
-