This sensor ID is already registered

Hello

I replaced my DTH11 sensor with a BMP280, so I no longer had my temperature and humidity data.
So I deleted my sensor to check it but I got a message:

My sensor ID: 4296827
controller: ESP8266

Can you help me?

Thanks in advance.

@Franpom I’ve restored the registration and changed the DHT to a BME(!)280.