diff --git a/htdocs/install/mysql/migration/8.0.0-9.0.0.sql b/htdocs/install/mysql/migration/8.0.0-9.0.0.sql
index 2087e032660..27301707360 100644
--- a/htdocs/install/mysql/migration/8.0.0-9.0.0.sql
+++ b/htdocs/install/mysql/migration/8.0.0-9.0.0.sql
@@ -265,3 +265,7 @@ CREATE TABLE llx_pos_cash_fence(
 -- Withdrawals / Prelevements
 UPDATE llx_const set name = 'PRELEVEMENT_END_TO_END' where name = 'END_TO_END';
 UPDATE llx_const set name = 'PRELEVEMENT_USTRD' where name = 'USTRD';
+
+
+ALTER TABLE llx_accounting_account DROP INDEX uk_accounting_account;
+ALTER TABLE llx_accounting_account ADD UNIQUE INDEX uk_accounting_account (account_number, entity, fk_pcg_version);