diff --git a/addons/sale_project/views/project_task_views.xml b/addons/sale_project/views/project_task_views.xml
index 6d279810c0c..0dc9cdcbd39 100644
--- a/addons/sale_project/views/project_task_views.xml
+++ b/addons/sale_project/views/project_task_views.xml
@@ -165,9 +165,8 @@
                 <field name="sale_line_id"
                     groups="!sales_team.group_sale_salesman"
                     string="Sales Order Item"
-                    options='{"no_open": True}'
+                    options='{"no_open": True, "no_create": True}'
                     context="{'create': False, 'edit': False, 'delete': False}"
-                    readonly="1"
                     invisible="not allow_billable or not project_id or not sale_line_id or not partner_id"/>
                 <field name="sale_line_id"
                     groups="sales_team.group_sale_salesman"