https://www.aras.com/community/f/development/18338/poly-itemsI&#39;m using a Poly Item for ItemType A and ItemType B. Both A and B have the same Foreign Property that I would like to use in my Poly Item. I&#39;m getting the error &quot; The property must be common to all sources or the property has inappropriate data type.ja-JPTelligent Community 12https://www.aras.com/community/thread/6280?ContentTypeID=1Wed, 20 Jan 2021 15:31:43 GMT916d3f7e-8ddc-42f8-8d45-380822f51406:d905b009-267e-4e18-b4a0-d20da71ca6b2Nathan H.<p>Did you ever get this to work?&nbsp; I am having the same problem.&nbsp; When I set the Foreign property it does not display the Foreign Property value until I save the ItemType.&nbsp; I&#39;m wondering if this is causing the problem.</p><div style="clear:both;"></div>https://www.aras.com/community/thread/5146?ContentTypeID=1Tue, 26 May 2020 21:11:40 GMT916d3f7e-8ddc-42f8-8d45-380822f51406:854cf5b7-9cb3-4f8a-90e8-b8ce5ed01beeNathan<p>My understanding of Poly Items is that the Poly Item Properties must be in all of the associated ItemTypes.&nbsp; So if the PolyItem has a Property of Tiger, both ItemType A and ItemType B need to have a property called Tiger.&nbsp; I was trying to add a new ItemType to a Poly Item and had to add a few fields to the new ItemType to match the Poly Item.&nbsp;</p><div style="clear:both;"></div>