Unable to receive device data in the Gateway Bridge

I have a multitech reader which sends device data(Omni Tag GPS) from packer forwarder to the Gateway Bridge. The Bridge is installed in a separate machine.

STEP 1

I used the command sudo tcpdump -AUq port 1700 and am able to see the below device message

[.{“rxpk”:[{“tmst”:1056907187,“chan”:4,“rfch”:1,“freq”:903.100000,“stat”:-1,“modu”:“LORA”,“datr”:“SF7BW125”,“codr”:“OFF”,“lsnr”:-11.8,“rssi”:-91,“size”:172,“data”:“Y9pAH93PABSXZKSQlMB3IwJJRN16zX4YO/Ajuro2GICULivIVQU4fISq32112xUmpqa+Hsf8NLyrCg9Okf6Kq3eUvMTUwkj1NMXKAZI/qKeNyqFH3P/RQWWnM2oKDD501Lnbz8YSK84dpW6seW/+rHqHL/s6W2I+fMrKHSmqKlwJF4aXEzpAvYe1IoXU0wYNTEPEkvI0MGOLS/pF2OWylglI+kmNzlQrsjqwNw==”}]}

STEP 2

The next step is to check if am able to receive the packets in the gateway bridge for which I used the command journalctl -f -n 100 -u chirpstack-gateway-bridge , but unable to see any device messages. This happens with only this device, whereas I am able to see the device data for other devices. Can you help me sort this issue. ?