The PostgreSQL backend produced an error
terminating connection due to administrator command
CONTEXT:  SQL statement "UPDATE ONLY "manage"."cam" SET "netboxid" = NULL WHERE $1 OPERATOR(pg_catalog.=) "netboxid""
SSL connection has been closed unexpectedly

Traceback (most recent call last):
  File "/usr/lib/nav/navclean", line 228, in <module>
    main(sys.argv[1:])
  File "/usr/lib/nav/navclean", line 58, in main
    connection.rollback()
psycopg2.InterfaceError: connection already closed