ruuvi_decoders seem to only want the data after the companyID
This should work:
from ruuvi_decoders import Df5Decoder
decoder = Df5Decoder()
data = '0201061BFF99040505C64D62CD62026C0320FFF4A2961DFBD7CF69C153A401'
data = data.split("FF9904")[1]
sensor = decoder.decode_data(data)
print(sensor)
Edit:
You can see more info about the data here Bluetooth advertisements - docs