ult.field.update({ AllowMultipleValues: true }, &quot;SP.FieldUser&quot;);
</code></pre>
<h3 id="add-a-lookup-field">Add a Lookup Field<a class="headerlink" href="#add-a-lookup-field" title="Permanent link">&para;</a></h3>
<p>Use the addLookup method to create a new lookup field.</p>
<pre><code class="language-TypeScript">import { spfi } from &quot;@pnp/sp&quot;;
import { FieldTypes } from &quot;@pnp/sp/fields/types&quot;;

import &quot;@pnp/sp/webs&quot;;
import &quot;@pnp/sp/lists&quot;;
import &quot;@pnp