diff --git a/addons/sale_purchase/models/product_template.py b/addons/sale_purchase/models/product_template.py
index d24cfd60e59..b3fb063f1cd 100644
--- a/addons/sale_purchase/models/product_template.py
+++ b/addons/sale_purchase/models/product_template.py
@@ -9,7 +9,7 @@ class ProductTemplate(models.Model):
     _inherit = 'product.template'
 
     service_to_purchase = fields.Boolean(
-        "Subcontract Service", company_dependent=True,
+        "Subcontract Service", company_dependent=True, copy=False,
         help="If ticked, each time you sell this product through a SO, a RfQ is automatically created to buy the product. Tip: don't forget to set a vendor on the product.")
 
     @api.constrains('service_to_purchase', 'seller_ids', 'type')