diff --git a/nfu_sale_order_batch_packaging/README.rst b/nfu_sale_order_batch_packaging/README.rst
index 0c737d9..96ff7ae 100644
--- a/nfu_sale_order_batch_packaging/README.rst
+++ b/nfu_sale_order_batch_packaging/README.rst
@@ -38,7 +38,8 @@ Changelog
 :1.1.0: Live
 :1.2.0: Add regeneration action for batch products
 :1.2.1: refactoring
-:1.3.0: add packagin states
+:1.3.0: add packaging states
+:1.3.1: add open_max_qty
 
 Bug Tracker
 ===========
diff --git a/nfu_sale_order_batch_packaging/__manifest__.py b/nfu_sale_order_batch_packaging/__manifest__.py
index 7578142..c6f2060 100644
--- a/nfu_sale_order_batch_packaging/__manifest__.py
+++ b/nfu_sale_order_batch_packaging/__manifest__.py
@@ -4,7 +4,7 @@
     "author": "BAKEUP",
     "website": "https://www.bakeup.org",
     "category": "Sale",
-    "version": "16.0.1.3.0",
+    "version": "16.0.1.3.1",
     "depends": ["sale", "sale_order_batch"],
     "data": [
         "views/sale_order_views.xml",
diff --git a/nfu_sale_order_batch_packaging/models/sale_order_batch_product.py b/nfu_sale_order_batch_packaging/models/sale_order_batch_product.py
index ceed397..fa673b1 100644
--- a/nfu_sale_order_batch_packaging/models/sale_order_batch_product.py
+++ b/nfu_sale_order_batch_packaging/models/sale_order_batch_product.py
@@ -8,33 +8,45 @@ class SaleOrderBatchProduct(models.Model):
     _inherit = "sale.order.batch.product"
 
     product_uom_max_qty = fields.Float("Max Qty", compute="_compute_product_uom_max_qty")
-    open_packaging_qty = fields.Float(compute="_compute_open_packagin_qty", store=True)
-    open_packaging_state = fields.Selection(selection=PACKAGING_STATES, compute="_compute_open_packagin_state")
+    open_packaging_qty = fields.Float(compute="_compute_open_packaging_qty")
+    open_packaging_max_qty = fields.Float(compute="_compute_open_packaging_max_qty")
+    open_packaging_state = fields.Selection(selection=PACKAGING_STATES, compute="_compute_open_packaging_state")
 
     @api.depends("sale_order_line_ids.product_uom_max_qty")
     def _compute_product_uom_max_qty(self):
         for product in self:
-            if product.sale_order_line_ids:
-                product.product_uom_max_qty = sum(product.sale_order_line_ids.mapped("product_uom_max_qty"))
-            else:
-                product.product_uom_max_qty = False
+            product.product_uom_max_qty = sum(product.sale_order_line_ids.mapped("product_uom_max_qty"))
 
     @api.depends("product_uom_qty")
-    def _compute_open_packagin_qty(self):
+    def _compute_open_packaging_qty(self):
         for product in self:
-            open_packaging_qty = product.product_packaging_qty - (
-                product.product_uom_qty % product.product_packaging_qty
-            )
-            product.open_packaging_qty = (
-                0 if open_packaging_qty == product.product_packaging_qty else open_packaging_qty
-            )
+            if product.product_packaging_id:
+                open_packaging_qty = product.product_packaging_qty - (
+                    product.product_uom_qty % product.product_packaging_qty
+                )
+                product.open_packaging_qty = (
+                    0 if open_packaging_qty == product.product_packaging_qty else open_packaging_qty
+                )
+            else:
+                product.open_packaging_qty = 0.0
+
+    @api.depends("product_uom_max_qty")
+    def _compute_open_packaging_max_qty(self):
+        for product in self:
+            if product.product_packaging_id:
+                if product.product_uom_max_qty < product.product_uom_qty + product.open_packaging_qty:
+                    product.open_packaging_max_qty = product.product_packaging_qty - (
+                        product.product_uom_max_qty % product.product_packaging_qty
+                    )
+                else:
+                    product.open_packaging_max_qty = 0.0
+            else:
+                product.open_packaging_max_qty = 0.0
 
     @api.depends("open_packaging_qty")
-    def _compute_open_packagin_state(self):
+    def _compute_open_packaging_state(self):
         for product in self:
-            if product.open_packaging_qty == 0:
-                product.open_packaging_state = "full"
-            elif (product.product_uom_max_qty - product.product_uom_qty) >= product.open_packaging_qty:
+            if product.open_packaging_qty == 0 or product.open_packaging_max_qty == 0:
                 product.open_packaging_state = "full"
             elif product.product_uom_qty < product.product_packaging_qty:
                 product.open_packaging_state = "open"
diff --git a/nfu_sale_order_batch_packaging/readme/HISTORY.rst b/nfu_sale_order_batch_packaging/readme/HISTORY.rst
index 9a4e888..b9882bb 100644
--- a/nfu_sale_order_batch_packaging/readme/HISTORY.rst
+++ b/nfu_sale_order_batch_packaging/readme/HISTORY.rst
@@ -3,4 +3,5 @@
 :1.1.0: Live
 :1.2.0: Add regeneration action for batch products
 :1.2.1: refactoring
-:1.3.0: add packagin states
\ No newline at end of file
+:1.3.0: add packaging states
+:1.3.1: add open_max_qty
\ No newline at end of file
diff --git a/nfu_sale_order_batch_packaging/static/description/index.html b/nfu_sale_order_batch_packaging/static/description/index.html
index 5b169be..97c524b 100644
--- a/nfu_sale_order_batch_packaging/static/description/index.html
+++ b/nfu_sale_order_batch_packaging/static/description/index.html
@@ -401,7 +401,9 @@ and adds a packaging default to sale order batch.</p>
 </tr>
 <tr class="field"><th class="field-name">1.2.1:</th><td class="field-body">refactoring</td>
 </tr>
-<tr class="field"><th class="field-name">1.3.0:</th><td class="field-body">add packagin states</td>
+<tr class="field"><th class="field-name">1.3.0:</th><td class="field-body">add packaging states</td>
+</tr>
+<tr class="field"><th class="field-name">1.3.1:</th><td class="field-body">add open_max_qty</td>
 </tr>
 </tbody>
 </table>
diff --git a/nfu_sale_order_batch_packaging/views/sale_order_batch_product_views.xml b/nfu_sale_order_batch_packaging/views/sale_order_batch_product_views.xml
index e8d7563..7624a11 100644
--- a/nfu_sale_order_batch_packaging/views/sale_order_batch_product_views.xml
+++ b/nfu_sale_order_batch_packaging/views/sale_order_batch_product_views.xml
@@ -6,7 +6,13 @@
                 <field name="inherit_id" ref="sale_order_batch.view_order_batch_product_form"/>
                 <field name="arch" type="xml">
                     <xpath expr="//group[@name='product_info']" position="inside">
-                        <field name="open_packaging_qty" decoration-warning="(open_packaging_state != 'full')"/>
+                        <field name="product_uom_max_qty"/>
+                        <field
+                    name="open_packaging_qty"
+                    decoration-warning="(open_packaging_state != 0) and not (open_packaging_max_qty != 0)"
+                    decoration-danger="(open_packaging_max_qty != 0)"
+                />
+                        <field name="open_packaging_max_qty" decoration-danger="(open_packaging_max_qty != 0)"/>
                         <field name="open_packaging_state"/>
                     </xpath>
                     <xpath