Warning log in storaged: Cannot find the part X in the graph space Y

[aminmaghsodi]

I see one of my storaged nodes (ip: 1.1.1.86) that generates many warning log with message: [...RaftexService.cpp:165] Cannot find the part 8 in the graph space 40

When I search for partition 8 in Nebula:
|Partition: 8 | Leader: "1.1.1.76:9779" | Peers: "1.1.1.75:9779, 1.1.1.76:9779, 1.1.1.77:9779" | Losts: "" |

When I search in 1.1.1.76 's storaged log, I see that it generates many log with message:

Host.cpp:348] [Port: 9780, Space: 40, Part: 8] [Host: 1.1.1.86:9780] Failed to append logs to the host (Err: E_UNKNOWN_PART)

Why the leader node, searches another node for a partition which is its own, when that partition is not exists in that node (neither as leader nor as fallower)

One solution in my mind is running BALANCE DATA, which may take too much time.
Another question is, is there any way to balance a specific partition?