The describegraph command for lncli returns a number of channels which have at the least one coverage set to null. In lots of circumstances, they’re each set to null, and last_update is about to 0, as proven within the following instance.

{
    "channel_id": "754441998110162945",
    "chan_point": "cb9eb6ae3f285da7cd120a83db7ceca4fee2c19eb72513530646e1bd340e1663:1",
    "last_update": 0,
    "node1_pub": "0227e8baab7b4397a88ea2bb3976a7fc8f975aa4fc28ef9272a33b6a1291ffff63",
    "node2_pub": "03864ef025fde8fb587d989186ce6a4a186895ee44a926bfc370e2c366597a3f8f",
    "capability": "480000",
    "node1_policy": null,
    "node2_policy": null
}

How is null speculated to be interpreted?

The channel above has a web page on 1ML. It reveals channel insurance policies for each friends. Why do the outcomes I get present null for each friends?