diff --git a/mysql/migration/2.6.0-2.7.0.sql b/mysql/migration/2.6.0-2.7.0.sql
index 3368b6afadd3f4e4700495e8d42f8411bd4ce628..6f8b34db8005e0f9ce630eaba21d2bb521190bca 100644
--- a/mysql/migration/2.6.0-2.7.0.sql
+++ b/mysql/migration/2.6.0-2.7.0.sql
@@ -170,4 +170,10 @@ ALTER TABLE llx_dolibarr_modules ADD PRIMARY KEY pk_dolibarr_modules (numero, en
 alter table llx_commande_fournisseur add column   ref_supplier        varchar(30) after entity;
 
 alter table llx_mailing add column bgcolor  varchar(8) after body;
-alter table llx_mailing add column bgimage  varchar(255) after bgcolor;
\ No newline at end of file
+alter table llx_mailing add column bgimage  varchar(255) after bgcolor;
+
+
+-- Request to clean corrupted database
+delete from llx_facture where facnumber = '(PROV)';
+delete from llx_commande where ref = '(PROV)';
+delete from llx_propal where ref = '(PROV)';