How i can place BO order using Fyers API?

data = {
    "symbol":ce_symbol,
    "qty":75,
    "type":1,
    "side":1,
    "productType":"BO",
    "validity":"DAY",
    "disclosedQty":0,
    "offlineOrder":False,
    "stopLoss":ltp-10,
    "takeProfit":ltp+20,
    "orderTag":"tag1"
}
response = fyers.place_order(data=data)
print(response)

output: {'code': -50, 'message': 'productType must be one of the following: "CNC", "MARGIN", "INTRADAY", "MTF"', 's': 'error'}
When i tried placing BO order using fyers API, it is not accepting the order.
Please reply,
and give proper solution to this.