Send proprietary payload error: rpc error: code = Unknown desc = lorawan/band: invalid data-rate

good afternoon could you help me

I am trying to configure the server that works for the region AU_902_928
where I have changed in the file loraserver.toml
[network_server.band]
name = “US_902_928”

[network_server.network_settings]
enabled_uplink_channels = [0, 1, 2, 3, 4, 5, 6, 7]

and also I made the change in lora-gateway-bridge but now I get this when executing:
sudo systemctl status loraserver

level = error msg = “finished unary call with code unknown” error = “rpc error: code = Unknow desc = lorawan / band: invalid data-rate” grpc.code = unknow grpc.method = sendpropietarypayload grpc.service = ns.networkserverservice grpc.start_time = 2019-07-19T16: 06: 57-05: 00 GRPC.TIME_MS = 0.142 peer.address = 127.0.0.0.1: 41882 span.kinds = server system = grpc

what can i do thanks i’m using lopy4 as nanogateway and node under abp mode