https://community.appian.com/discussions/f/data/30921/cdt-relationsI establish a One-to-One parent-child relationship in Appian by including a reference field for the child Custom Data Type (CDT) within the parent CDT during creation. Although the parent CDT is successfully published in the database, initially, the childen-USTelligent Community 12https://community.appian.com/thread/123260?ContentTypeID=1Tue, 19 Dec 2023 06:32:17 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:db414928-69d4-4c93-b8a6-99250ed5b172varaprasadt0001<p>Hi Kiran&nbsp;</p> <p>Thank you for your reply during the updation of data i see that my child primary key was missing so today i sort out my issue&nbsp;</p> <p>thank you kiran&nbsp;</p><div style="clear:both;"></div>https://community.appian.com/thread/123213?ContentTypeID=1Mon, 18 Dec 2023 05:39:51 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:d5538265-a331-472c-9863-709f9c9883b1Niranjan79<p>just to know&nbsp;whether you are&nbsp; passing primary key id of the records while updating. If you are passing then just provide some screenshots what you have done to better understand the scenario.</p><div style="clear:both;"></div>