can't add related docs in kb edit page

[LeoMcA]

Uncaught Error: Syntax error, unrecognized expression: [data-pk=]
    jQuery 8
    createResultsList wiki_search.js:26
    jQuery 7
    createResultsList wiki_search.js:21
    showResults wiki_search.js:42
    callback cached_xhr.js:49
    jQuery 6
    request cached_xhr.js:61
    query search_utils.js:73
    searchTimeout wiki_search.js:58
    setTimeout handler*handleSearch wiki_search.js:57
    jQuery 7
    js wiki_search.js:63
    js wiki_search.js:79
    Webpack 7
jquery.js:1496

requires the search results to return an id, which it doesn't

[AliceWyman]

Related bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1729134