ERROR chirpstack::uplink: Deduplication error error=unexpected major

ChirpStack (v4)
1

Hi,
I find this error in the logs, can anyone help me?
ERROR chirpstack::uplink: Deduplication error error=unexpected major

Thanks in advance

2023-04-02T07:26:56.666162Z  INFO stats{gateway_id=7276ff002e061200}: chirpstack::storage::gateway: Gateway state and location updated gateway_id=7276ff002e061200
2023-04-02T07:26:56.666465Z  INFO stats{gateway_id=7276ff002e061200}: chirpstack::storage::metrics: Metrics saved name=gw:7276ff002e061200 aggregation=HOUR
2023-04-02T07:26:56.666855Z  INFO stats{gateway_id=7276ff002e061200}: chirpstack::storage::metrics: Metrics saved name=gw:7276ff002e061200 aggregation=DAY
2023-04-02T07:26:56.667220Z  INFO stats{gateway_id=7276ff002e061200}: chirpstack::storage::metrics: Metrics saved name=gw:7276ff002e061200 aggregation=MONTH
2023-04-02T07:26:56.699183Z  INFO chirpstack::gateway::backend::mqtt: Message received from gateway region_config_id="eu868" topic="eu868/gateway/7276ff002e0613ac/event/up" qos=0 json=false
2023-04-02T07:26:56.699460Z  INFO chirpstack::gateway::backend::mqtt: Message received from gateway region_config_id="eu868" topic="eu868/gateway/7276ff002e0613ac/event/up" qos=0 json=false
2023-04-02T07:26:56.824015Z ERROR chirpstack::uplink: Deduplication error error=unexpected major
2023-04-02T07:26:56.901546Z ERROR chirpstack::uplink: Deduplication error error=unexpected major
2023-04-02T07:26:58.276957Z  INFO chirpstack::gateway::backend::mqtt: Message received from gateway region_config_id="eu868" topic="eu868/gateway/7276ff002e0613ac/event/up" qos=0 json=false
2023-04-02T07:26:58.479134Z  INFO up{deduplication_id=9b596e64-aa8d-4cf1-afbd-1201800c5f11}: chirpstack::uplink: Uplink received m_type="UnconfirmedDataUp"
2023-04-02T07:26:58.479150Z DEBUG up{deduplication_id=9b596e64-aa8d-4cf1-afbd-1201800c5f11}: chirpstack::uplink: Updating gateway meta-data for uplink frame-set
2023-04-02T07:26:58.479658Z DEBUG up{deduplication_id=9b596e64-aa8d-4cf1-afbd-1201800c5f11}: chirpstack::uplink: Logging uplink frame to Redis Stream
2023-04-02T07:26:58.480259Z  WARN up{deduplication_id=9b596e64-aa8d-4cf1-afbd-1201800c5f11}:data_up: chirpstack::uplink::data: No device-session exists for dev_addr dev_addr=003902fc
2023-04-02T07:27:11.337603Z  INFO chirpstack::gateway::backend::mqtt: Message received from gateway region_config_id="eu868" topic="eu868/gateway/7276ff002e0700a9/event/stats" qos=0 json=false
2023-04-02T07:27:11.341093Z  INFO stats{gateway_id=7276ff002e0700a9}: chirpstack::storage::gateway: Gateway state and location updated gateway_id=7276ff002e0700a9
2023-04-02T07:27:11.341317Z  INFO stats{gateway_id=7276ff002e0700a9}: chirpstack::storage::metrics: Metrics saved name=gw:7276ff002e0700a9 aggregation=HOUR
2023-04-02T07:27:11.341596Z  INFO stats{gateway_id=7276ff002e0700a9}: chirpstack::storage::metrics: Metrics saved name=gw:7276ff002e0700a9 aggregation=DAY
2023-04-02T07:27:11.341858Z  INFO stats{gateway_id=7276ff002e0700a9}: chirpstack::storage::metrics: Metrics saved name=gw:7276ff002e0700a9 aggregation=MONTH
2

This could be a device that uses LoRa modulation, but does not implement LoRaWAN. The error indicates that the LoRaWAN frame contains unexpected data.

3

Thank you, It’s possible.

4

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