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 643e411ee5e..d1cc00f403f 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
@@ -272,10 +272,15 @@ UPDATE llx_const set name = 'PRELEVEMENT_USTRD' where name = 'USTRD';
 
 -- Delete duplicate accounting account, but only if not used
 DROP TABLE tmp_llx_accouting_account;
-CREATE TABLE tmp_llx_accouting_account AS SELECT MIN(rowid) as MINID, account_number, entity, fk_pcg_version, count(*) AS NB FROM llx_accounting_account group BY account_number, entity, fk_pcg_version HAVING count(*) >= 2 order by account_number, entity, fk_pcg_version;
+CREATE TABLE tmp_llx_accouting_account AS SELECT MIN(rowid) as MINID, MAX(rowid) as MAXID, account_number, entity, fk_pcg_version, count(*) AS NB FROM llx_accounting_account group BY account_number, entity, fk_pcg_version HAVING count(*) >= 2 order by account_number, entity, fk_pcg_version;
 --SELECT * from tmp_llx_accouting_account;
 DELETE from llx_accounting_account where rowid in (select minid from tmp_llx_accouting_account where minid NOT IN (SELECT fk_code_ventilation from llx_facturedet) AND minid NOT IN (SELECT fk_code_ventilation from llx_facture_fourn_det) AND minid NOT IN (SELECT fk_code_ventilation from llx_expensereport_det));
 
+-- If there is record in tmp_llx_accouting_account, make a look on each line to do
+--update llx_facturedet        set fk_code_ventilation = maxid WHERE fk_code_ventilation = minid;
+--update llx_facture_fourn_det set fk_code_ventilation = maxid WHERE fk_code_ventilation = minid;
+--update llx_expensereport_det set fk_code_ventilation = maxid WHERE fk_code_ventilation = minid;
+
 
 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);