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 be072b8bacb..cbcb3bcacbb 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
@@ -28,6 +28,14 @@
 -- Note: fields with type BLOB/TEXT can't have default value.
 
 
+-- Missing in 8.0 ?
+ALTER TABLE llx_accounting_account MODIFY COLUMN fk_pcg_version varchar(32) NOT NULL;
+ALTER TABLE llx_accounting_account MODIFY COLUMN account_number varchar(32) NOT NULL;
+
+-- For 9.0
+
+ALTER TABLE llx_accounting_account MODIFY COLUMN account_parent varchar(32) DEFAULT NULL;
+
 ALTER TABLE llx_extrafields ADD COLUMN help text NULL;
 ALTER TABLE llx_extrafields ADD COLUMN totalizable boolean DEFAULT FALSE after list;
 
diff --git a/htdocs/install/mysql/tables/llx_accounting_account.sql b/htdocs/install/mysql/tables/llx_accounting_account.sql
index 79215115cfb..024c6ed53bf 100644
--- a/htdocs/install/mysql/tables/llx_accounting_account.sql
+++ b/htdocs/install/mysql/tables/llx_accounting_account.sql
@@ -29,7 +29,7 @@ create table llx_accounting_account
   pcg_type                  varchar(20)  NOT NULL,			  -- First part of Key for predefined groups
   pcg_subtype               varchar(20)  NOT NULL,            -- Second part of Key for predefined groups 
   account_number            varchar(32)  NOT NULL,
-  account_parent            integer DEFAULT 0,                -- Hierarchic parent.
+  account_parent            varchar(32)  DEFAULT NULL,        -- Hierarchic parent.
   label                     varchar(255) NOT NULL,
   fk_accounting_category    integer      DEFAULT 0,			  -- ID of personalized group for report
   fk_user_author            integer      DEFAULT NULL,