diff --git a/bin/addons/base/res/bank.py b/bin/addons/base/res/bank.py
index 4fd2c913147..1a16208403f 100644
--- a/bin/addons/base/res/bank.py
+++ b/bin/addons/base/res/bank.py
@@ -33,7 +33,7 @@ class Bank(osv.osv):
 	_description='Bank'
 	_name = 'res.bank'
 	_columns = {
-		'name': fields.char('Name', size=128, required=True),
+		'name': fields.char('Name', size=128),
 		'code': fields.char('Code', size=64),
 		'street': fields.char('Street', size=128),
 		'street2': fields.char('Street2', size=128),
diff --git a/doc/migrate/4.0.0-4.2.0/pre.py b/doc/migrate/4.0.0-4.2.0/pre.py
index b9ab20a12ce..1ea4cea4738 100644
--- a/doc/migrate/4.0.0-4.2.0/pre.py
+++ b/doc/migrate/4.0.0-4.2.0/pre.py
@@ -177,11 +177,37 @@ cr.commit()
 
 cr.execute('SELECT a.attname FROM pg_class c, pg_attribute a, pg_type t WHERE c.relname = \'product_uom\' AND a.attname = \'factor\' AND c.oid = a.attrelid AND a.atttypid = t.oid AND t.typname = \'float8\'')
 if cr.fetchall():
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_account_analytic_planning_stat_account\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_account_analytic_planning_stat_account')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_account_analytic_planning_stat\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_account_analytic_planning_stat')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_account_analytic_planning_stat_user\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_account_analytic_planning_stat_user')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_purchase_order_product\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_purchase_order_product')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_purchase_order_category\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_purchase_order_category')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_sale_order_product\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_sale_order_product')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_sale_order_category\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_sale_order_category')
+	cr.execute('SELECT viewname FROM pg_views WHERE viewname = \'report_hr_timesheet_invoice_journal\'')
+	if cr.fetchall():
+		cr.execute('DROP VIEW report_hr_timesheet_invoice_journal')
+
 	cr.execute('ALTER TABLE product_uom RENAME COLUMN factor to temp_column')
 	cr.execute('ALTER TABLE product_uom ADD COLUMN factor NUMERIC(12,6)')
 	cr.execute('UPDATE product_uom SET factor = temp_column')
-	cr.execute('ALTER TABLE product_uom SET factor NOT NULL')
+	cr.execute('ALTER TABLE product_uom ALTER factor SET NOT NULL')
 	cr.execute('ALTER TABLE product_uom DROP COLUMN temp_column')
+cr.commit()
 
 
 # ------------------------------------------------- #