[FIX] state error

Author: hazei-odoo

estate/models/estate_property_offer.py

@@ -36,7 +36,7 @@ def action_accept(self):
                 raise UserError("A refused offer cannot be accepted.")
             else:
                 offer.status = 'accepted'
-                offer.property_id.status = 'offer_accepted'
+                offer.property_id.state = 'offer_accepted'
         return True
 
     def action_refuse(self):