diff --git a/account_brand/models/account_move.py b/account_brand/models/account_move.py
index 46e8c96d2..6ca9a6eae 100644
--- a/account_brand/models/account_move.py
+++ b/account_brand/models/account_move.py
@@ -9,14 +9,7 @@ class AccountMove(models.Model):
     _name = "account.move"
     _inherit = ["account.move", "res.brand.mixin"]
 
-    brand_id = fields.Many2one(
-        states={
-            "open": [("readonly", True)],
-            "in_payment": [("readonly", True)],
-            "paid": [("readonly", True)],
-            "cancel": [("readonly", True)],
-        }
-    )
+    brand_id = fields.Many2one()
 
     def _is_brand_required(self):
         self.ensure_one()
diff --git a/account_brand/tests/test_brand_mixin.py b/account_brand/tests/test_brand_mixin.py
index 9c8443573..50bbca2df 100644
--- a/account_brand/tests/test_brand_mixin.py
+++ b/account_brand/tests/test_brand_mixin.py
@@ -1,6 +1,8 @@
 # Copyright 2019 ACSONE SA/NV
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
+import json
+
 from lxml import etree
 
 from odoo.exceptions import ValidationError
@@ -103,6 +105,20 @@ def test_get_view(self):
         doc = etree.XML(view["arch"])
         self.assertTrue(doc.xpath("//field[@name='brand_use_level']"))
 
+    def test_get_view_keeps_view_readonly(self):
+        view = self.env["account.move"].get_view(
+            view_id=self.env.ref("account.view_move_form").id,
+            view_type="form",
+        )
+        doc = etree.XML(view["arch"])
+        brand_node = doc.xpath("//field[@name='brand_id']")[0]
+        modifiers = json.loads(brand_node.get("modifiers"))
+        self.assertEqual(modifiers["readonly"], [["state", "!=", "draft"]])
+        self.assertEqual(
+            modifiers["required"],
+            [["brand_use_level", "=", BRAND_USE_LEVEL_REQUIRED_LEVEL]],
+        )
+
     def test_reverse_move(self):
         move = self.env["account.move"].create(
             {
diff --git a/brand/models/res_brand_mixin.py b/brand/models/res_brand_mixin.py
index 4c4c0bcc1..508245c3f 100644
--- a/brand/models/res_brand_mixin.py
+++ b/brand/models/res_brand_mixin.py
@@ -1,5 +1,7 @@
 # Copyright 2019 ACSONE SA/NV
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+import json
+
 from lxml import etree
 
 from odoo import _, api, fields, models
@@ -57,6 +59,7 @@ def setup_modifiers(self, node, field=None):
         attributes = ["invisible", "readonly", "required"]
         if field is not None:
             ir_ui_view.transfer_field_to_modifiers(field, modifiers, attributes)
+        modifiers.update(json.loads(node.get("modifiers") or "{}"))
         ir_ui_view.transfer_node_to_modifiers(node, modifiers)
         ir_ui_view.transfer_modifiers_to_node(modifiers, node)
 
diff --git a/sale_brand/models/sale_order.py b/sale_brand/models/sale_order.py
index f8be2fe49..1fb5f3158 100644
--- a/sale_brand/models/sale_order.py
+++ b/sale_brand/models/sale_order.py
@@ -8,14 +8,7 @@ class SaleOrder(models.Model):
     _name = "sale.order"
     _inherit = ["sale.order", "res.brand.mixin"]
 
-    brand_id = fields.Many2one(
-        states={
-            "sent": [("readonly", True)],
-            "sale": [("readonly", True)],
-            "done": [("readonly", True)],
-            "cancel": [("readonly", True)],
-        }
-    )
+    brand_id = fields.Many2one()
 
     def _prepare_invoice(self):
         invoice_vals = {}
diff --git a/sale_brand/tests/test_sale_order.py b/sale_brand/tests/test_sale_order.py
index af09ab538..01701925d 100644
--- a/sale_brand/tests/test_sale_order.py
+++ b/sale_brand/tests/test_sale_order.py
@@ -1,6 +1,10 @@
 # Copyright 2019 ACSONE SA/NV
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
+import json
+
+from lxml import etree
+
 from odoo.tests.common import TransactionCase
 
 
@@ -48,3 +52,13 @@ def test_brand_onchange_team(self):
         sale.brand_id = brand.id
         sale._onchange_team_id()
         self.assertEqual(sale.brand_id, brand)
+
+    def test_get_view_keeps_view_readonly(self):
+        view = self.env["sale.order"].get_view(
+            view_id=self.env.ref("sale.view_order_form").id,
+            view_type="form",
+        )
+        doc = etree.XML(view["arch"])
+        brand_node = doc.xpath("//field[@name='brand_id']")[0]
+        modifiers = json.loads(brand_node.get("modifiers"))
+        self.assertEqual(modifiers["readonly"], [["state", "!=", "draft"]])