Downlink error after publishing with mosquitto

We are using mosquitto to publish data to RabbitMQTT Server. Everything works fine until we execute this:

mosquitto_pub -h localhost -p 1884 -t “application/1/node/0000000000000001/tx” -m “{“reference”: “ref1234”,“confirmed”: true,“fPort”:1,“data”: “cHJvdmE=”}” -u ‘admin’ -P ‘admin’

In this moment we receive the payload on the node but we get this error on loraserver log:

processing rx packet error: get node-session error: node-session does not exist or invalid fcnt or mic

After that every time the node transmits up to loraserver, it gets the same payload even if we are not publishing anymore. And the error on loraserver log keeps appearing every time.

What are we doing wrong?