Unknown cluster data in zigbee device

Hi,
I am trying to send power data on gateway from zigbee node by using Cluster_id 0X0B04, I am getting warning message

2019-02-25 15:44:20 DEBUG (MainThread) [zigpy.endpoint] Ignoring unknown cluster ID 0x0b04
2019-02-25 15:44:20 WARNING (MainThread) [bellows.zigbee.application] Unexpected response TSN=62 command=257 args=b'\x01\x00\x00\x00\x00\x07\x01\x05\x05\t\x08\x07'
2019-02-25 15:44:20 WARNING (MainThread) [zigpy.endpoint] [0xf988:4] Message on unknown cluster 0x0b04

Why I am getting this, can anybody tell me.