RAK7431 cannot connect to chirpstack

LPWAN Nodes
1

Device last seen is never.
Here are some of my configurations：

4a108eea431f2bab625358b853cc523
4a108eea431f2bab625358b853cc5231024×4092 157 KB

2

You can go to Application > Device eui > OTAA keys > Flush all Device Nonces.

3

1732003161939
17320031619391717×921 190 KB

After this operation, the error still persists.

4

Successfully connected using ABP mode!

5

Verify that the LoRaWAN network settings (frequency, region, data rate) on the RAK7431 match those configured in ChirpStack.