diff --git a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
index c94b1cfcdaa..6d9aebf934f 100644
--- a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
+++ b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
@@ -141,13 +141,13 @@ ALTER TABLE llx_bank ADD COLUMN amount_main_currency double(24,8) NULL;
 ALTER TABLE llx_element_contact DROP FOREIGN KEY fk_element_contact_fk_c_type_contact;
 ALTER TABLE llx_societe_contacts DROP FOREIGN KEY fk_societe_contacts_fk_c_type_contact;
 
---VMYSQL4.3 ALTER TABLE llx_c_type_contact ADD PRIMARY KEY(rowid);
---VMYSQL4.3 ALTER TABLE llx_c_type_contact CHANGE COLUMN rowid rowid INTEGER NOT NULL AUTO_INCREMENT;
+-- VMYSQL4.3 ALTER TABLE llx_c_type_contact ADD PRIMARY KEY(rowid);
+-- VMYSQL4.3 ALTER TABLE llx_c_type_contact CHANGE COLUMN rowid rowid INTEGER NOT NULL AUTO_INCREMENT;
 
---VPGSQL8.2 CREATE SEQUENCE llx_c_type_contact_rowid_seq OWNED BY llx_c_type_contact.rowid;
---VPGSQL8.2 ALTER TABLE llx_c_type_contact ADD PRIMARY KEY (rowid);
---VPGSQL8.2 ALTER TABLE llx_c_type_contact ALTER COLUMN rowid SET DEFAULT nextval('llx_c_type_contact_rowid_seq');
---VPGSQL8.2 SELECT setval('llx_c_type_contact_rowid_seq', MAX(rowid)) FROM llx_c_type_contact;
+-- VPGSQL8.2 CREATE SEQUENCE llx_c_type_contact_rowid_seq OWNED BY llx_c_type_contact.rowid;
+-- VPGSQL8.2 ALTER TABLE llx_c_type_contact ADD PRIMARY KEY (rowid);
+-- VPGSQL8.2 ALTER TABLE llx_c_type_contact ALTER COLUMN rowid SET DEFAULT nextval('llx_c_type_contact_rowid_seq');
+-- VPGSQL8.2 SELECT setval('llx_c_type_contact_rowid_seq', MAX(rowid)) FROM llx_c_type_contact;
 
 insert into llx_c_type_contact(element, source, code, libelle, active ) values ('conferenceorbooth', 'internal', 'MANAGER',  'Conference or Booth manager', 1);
 insert into llx_c_type_contact(element, source, code, libelle, active ) values ('conferenceorbooth', 'external', 'SPEAKER',   'Conference Speaker', 1);