label name "node" is not unique: invalid sample

[kuberxy]

The following error occurred when prometheus scrape metric:

The same label name does exist in the metric exposed by rabbitmq:

# TYPE rabbitmq_core_node_node_send_bytes counter
# HELP rabbitmq_core_node_node_send_bytes Count of bytes sent to node.
rabbitmq_core_node_node_send_bytes{node="rabbit@cytest2",node="rabbit@cytest1"} 169988
rabbitmq_core_node_node_send_bytes{node="rabbit@cytest2",node="rabbit@cytest3"} 193661
# TYPE rabbitmq_core_node_node_recv_bytes counter
# HELP rabbitmq_core_node_node_recv_bytes Count of bytes received from node.
rabbitmq_core_node_node_recv_bytes{node="rabbit@cytest2",node="rabbit@cytest1"} 148554
rabbitmq_core_node_node_recv_bytes{node="rabbit@cytest2",node="rabbit@cytest3"} 371056