diff --git a/odex25_sales/dev_membership/models/dev_membership.py b/odex25_sales/dev_membership/models/dev_membership.py
index 30db53210..b4ca5c59c 100644
--- a/odex25_sales/dev_membership/models/dev_membership.py
+++ b/odex25_sales/dev_membership/models/dev_membership.py
@@ -143,11 +143,14 @@ class DevMembership(models.Model):
         if not self.invoice_id and not self.is_free:
             raise ValidationError(_('Please Create Membership Invoice'))
         if self.invoice_id.payment_state not in ['paid','in_payment'] and not self.is_free:
-            raise ValidationError(_('Membership Invoice is not paid.\nPlease Paid membership invoice and active the membership.'))
+            raise ValidationError(_('Membership Invoice is not paid.\nPlease pay the membership invoice and activate the membership.'))
         else:
-            self.invoice_id = self.invoice_id.payment_state
+            # Assuming you have a field to track payment state
+            self.payment_state = self.invoice_id.payment_state
+        
         self.state = 'active'
         self.partner_id.product_id = self.product_id.id
+        
         if not self.partner_id.join_date:
             self.partner_id.join_date = self.from_date
         if not self.partner_id.membrship_level:
@@ -155,6 +158,7 @@ class DevMembership(models.Model):
         if not self.partner_id.memebership_end_date:
             self.partner_id.memebership_end_date = self.to_date
 
+
     def action_cancel_membership(self):
         self.state = 'cancel'