https://community.appian.com/discussions/f/new-to-appian/26979/preventing-pickerfieldusers-from-allowing-you-to-select-the-same-user-twiseHi All, I am able to see the user which is already selected previously in the pickerFieldUsers, how to hide/prevent the users&#39; which already selected from pickerFieldUsers ? Thank Youen-USTelligent Community 12https://community.appian.com/thread/105955?ContentTypeID=1Mon, 26 Dec 2022 16:53:31 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:8db525a8-d855-4305-af8e-c71e3b01f990susmethaasirir<p>Have a duplicate check in the saveInto</p> <pre><span class="nf">a!pickerFieldUsers</span><span class="ow">(</span> <span class="ss">label:</span> <span class="s">&quot;Users&quot;</span><span class="ow">,</span> <span class="ss">maxSelections:</span> <span class="mi">3</span><span class="ow">,</span> groupFilter:cons!AA_STATES, <span class="ss">value:</span> <span class="k">local!pickedStates</span><span class="ow">,</span> <span class="cm">/* The union() function allows duplicate Users to be ignored, returning only unique elements.*/</span> <span class="ss">saveInto:</span> <span class="nf">a!save</span><span class="ow">(</span><span class="k">local!pickedStates</span><span class="ow">,</span> <span class="nf">union</span><span class="ow">(</span><span class="k">save!value</span><span class="ow">,</span> <span class="k">save!value</span><span class="ow">))</span> <span class="ow">)</span></pre><div style="clear:both;"></div>