that command line will dump a backup without the search index table which will prevent xenforo script to function correctly after restoration because of the missing xf_search_index. what I had in mind is a dump backup including empty search index table like in a fresh install
If there is no such comand line can do that then I have to create xf_serach_index manually after restoration or import the table from another fresh install xenforo with empty xf_serach_index which is somthing easy to do.