diff --git a/htdocs/install/mysql/tables/llx_accountingaccount.key.sql b/htdocs/install/mysql/tables/llx_accountingaccount.key.sql
index 5ddd524592e..49758c3d4ea 100644
--- a/htdocs/install/mysql/tables/llx_accountingaccount.key.sql
+++ b/htdocs/install/mysql/tables/llx_accountingaccount.key.sql
@@ -20,5 +20,6 @@
 
 ALTER TABLE llx_accountingaccount ADD INDEX idx_accountingaccount_fk_pcg_version (fk_pcg_version);
 
-
 ALTER TABLE llx_accountingaccount ADD CONSTRAINT fk_accountingaccount_fk_pcg_version  FOREIGN KEY (fk_pcg_version)    REFERENCES llx_accounting_system (pcg_version);
+
+--ALTER TABLE llx_accountingaccount ADD CONSTRAINT fk_accountingaccount_fk_account_number  FOREIGN KEY (fk_account_number)    REFERENCES llx_accountingaccount (account_number);