Is it an error? Witness node on RPi4

Here is the result of docker ps command:

[root@cryptopie ~]# docker ps
CONTAINER ID   IMAGE                                           COMMAND                  CREATED        STATUS        PORTS     NAMES
6cb92030506a   registry.gitlab.com/blurt/blurt/megadrive:dev   "/usr/bin/blurtd --d…"   26 hours ago   Up 26 hours             blurtd

and top:

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
    760 root      20   0 9786560  36364  23060 S 199.3   0.5   2555:58 blurtd

It seems the rpi4 is doing something very hard but when I printed out the blurtd container, it seems blurtd process is dead due to an error:

345763ms p2p_plugin.cpp:231            handle_block         ] Rethrowing as graphene::net exception
345763ms fork_database.cpp:43          push_block           ] Pushing block to fork database that failed to link: 000005780f862936034defdf11e4d94ed849e336, 1400
345763ms fork_database.cpp:44          push_block           ] Head: 1201, 000004b15d5fef838596800d38249c9197a4b947
345764ms p2p_plugin.cpp:229            handle_block         ] Error when pushing block:
4080000 unlinkable_block_exception: unlinkable block
block does not link to known chain
    {}
    fork_database.cpp:64 _push_block

    {}
    database.cpp:871 _push_block

    {"new_block":{"previous":"00000577fa4c2fc61cb2425cba657da33e237428","timestamp":"2020-07-04T03:00:09","witness":"initblurt2","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"2045a973bfa43b1f43bb7b7e4401dde119e1926a517e0445f12aebb182ceecb629487ee9d1989ff97c1d4802920f1bcc56436f62f91619ea4b628cbdea231dc378","transactions":[]}}
    database.cpp:759 operator()
345764ms p2p_plugin.cpp:231            handle_block         ] Rethrowing as graphene::net exception

Do I have to restart the syncing command, which is update.sh on rpi4?

@jacobgadikian