[FIX] do not use project from context

models/sale_project.py

@@ -128,7 +128,7 @@ class SaleProject(models.Model):
                             }
                         )
                         for sol in sols:
-                            self.env["sale.order.line"].create(sol)
+                            self.env["sale.order.line"].with_context(default_project_id=False).create(sol)
             else:
                 super(SaleProject, self).update_order_lines()
         self.sale_order_id.clean_sale_order()