GTT Order is saying "message": "Invalid order params." , "error_type": "InputException"

Tried placing GTT in multiple ways then also always giving "Invalid order params".
Also added authorization: Authorization: token api_key:access_token
Url: https://api.kite.trade/gtt/triggers
This is my Postman's BODY:
Body:
{
"condition": {
"exchange": "NFO",
"last_price": 12.95,
"tradingsymbol": "NIFTY2480824800CE",
"trigger_values": [
15.1
]
},
"orders": [
{
"exchange": "NFO",
"tradingsymbol": "NIFTY2480824800CE",
"product": "CNC",
"order_type": "LIMIT",
"transaction_type": "BUY",
"quantity": 25,
"price": 15.1
}
],
"type": "single"
}

Attached Image: