https://community.appian.com/discussions/f/user-interface/17351/remove-duplicate-values-in-editable-gridHi All, I have a scenario like I have a drop down in editable grid, 1st i I add a value through dropdown, 2nd time when I add a value if I select the same value as first it should throw validation error, saying duplicate value found please removeen-USTelligent Community 12https://community.appian.com/thread/68387?ContentTypeID=1Thu, 25 Jul 2019 11:05:06 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:5a703613-8087-4d54-ad1e-493947d051e6Dude<p>To avoid duplicate use union(array1,array2). Use it in a!save() along with append()</p><div style="clear:both;"></div>https://community.appian.com/thread/68375?ContentTypeID=1Wed, 24 Jul 2019 21:05:45 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:84530f72-15b5-4f01-85f6-d540ccf3a182Mike Schmitt<p>Hi,</p> <p>Someone else asked a somewhat-similar question <a href="/discussions/f/general/17306/restricting-duplicate-drop-down-rows-in-editable-grid">just a few days ago</a>, and I provided an example implementation where subsequent rows don&#39;t even get the option of duplicate dropdown values (though just validating against duplicate choices would also be possible).&nbsp; I encourage you to check it out and see if it gives you any ideas.</p><div style="clear:both;"></div>