DDoS Warning using Kucoin exchange

[plusiv]

Hi, I was trying BB_RPB_TSL.py with Kucoin as exchange, but I'm getting this warning constantly:

freqtrade | 2022-01-10 06:11:50,256 - freqtrade.exchange.common - WARNING - _async_get_candle_history() returned exception: "kucoin GET https://openapi-v2.kucoin.com/api/v1/market/candles?symbol=LTC-USDT&type=1day&startAt=1641427200&endAt=1684627200 429 Too Many Requests {"code":"429000","msg":"Too Many Requests"}"
freqtrade | 2022-01-10 06:11:50,257 - freqtrade.exchange.common - WARNING - retrying _async_get_candle_history() still for 4 times
freqtrade | 2022-01-10 06:11:50,258 - freqtrade.exchange.common - WARNING - Kucoin 429 error, avoid triggering DDosProtection backoff delay. 3 tries left before giving up

I've increased the Rate Limit from default (50) to 3100 under exchange.ccxt_async_config.rateLimit, but the warning persist.

Is this normal and I'm just have to ignore it?

Thanks in advance for your help!