# Changing UDT Parent Type **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [April 20, 2021, 7:26pm UTC](https://forum.inductiveautomation.com/t/changing-udt-parent-type/45825 "2021-04-20T19:26:19Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [April 20, 2021, 9:46pm UTC](https://forum.inductiveautomation.com/t/changing-udt-parent-type/45825/2 "2021-04-20T21:46:48Z")
Yep, it's broken and was applied incorrectly to _all_ UDT instances instead. Super frustrating as in order to change the parent now you have to delete the tags altogether and reimport... I raised a bug with support but haven't heard anything from them and it's been almost a month, also posted below > [@\[IGN-2416\] 8.1.4-RC1 Can't change parent data type of non-nested UDT instance](http://forum.inductiveautomation.com/t/bug-regression-8-1-4-rc1-cant-change-parent-data-type-of-non-nested-udt-instance/44769): > > I’m trying to change the parent UDT type of a whole bunch of UDT instances, however I can no longer do this. I know there was a change that was going in at some stage that was going to stop nested UDT instances within a base UDT definition from being changed (makes sense), but this change is affecting the base level as well. Error is: Bad\_Unsupported("Cannot change typeId of inherited tag These tank instances below are instantiated within the Tanks folder, and their parent data type is greyed… --- _[View the full topic](https://forum.inductiveautomation.com/t/changing-udt-parent-type/45825)._