Error trying to create sales order with frappe client - Please HELP

Hi I am having the following error while creating a sales order with insert:

FrappeException: ["Traceback (most recent call last):\n File \"/home/frappe/frappe-bench/apps/frappe/frappe/app.py\", line 68, in application\n response = frappe.api.handle()\n File “/home/frappe/frappe-bench/apps/frappe/frappe/api.py”, line 140, in handle\n doc = frappe.get_doc(data).insert()\n File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 239, in insert\n self._validate()\n File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 493, in _validate\n self._validate_mandatory()\n File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 813, in _validate_mandatory\n name=self.name))\nfrappe.exceptions.MandatoryError: [Sales Order, SAL-ORD-2021-00040]: customer\n"]

indent preformatted text by 4 spaces
 conn.insert({
  "doctype": "Sales Order",
  "order_type": "Sales",
  "naming_series": "SAL-ORD-.YYYY.-",
  "company": "Alima-Mexico",
    "customer_name": "Alima Cliente",
  "delivery_date": "1-1-2021",
  "transaction_date": "1-1-2021",
  "set_warehouse": "Producto terminado Yunque - AMX",
  #"status": "Borrador",
  "items":  [{
            "item_code": "VR00033",
            "item_name": "Zarzamora",
            "description":"Zarzamora",
            "uom": "Kg",
            "rate": 50.5,
            "price_list_rate" : 50.5,
            "qty": 1
  }]

})