# Derived Tag Source Change - Storing History

**URL:** <https://forum.inductiveautomation.com/t/derived-tag-source-change-storing-history/52281>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [October 25, 2021, 5:16am UTC](https://forum.inductiveautomation.com/t/derived-tag-source-change-storing-history/52281 "2021-10-25T05:16:12Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![james.beeley](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/james.beeley/32/28019_2.png) [@james.beeley](https://forum.inductiveautomation.com/u/james.beeley)\
**Post date:** [October 25, 2021, 5:34am UTC](https://forum.inductiveautomation.com/t/derived-tag-source-change-storing-history/52281/2 "2021-10-25T05:34:21Z")

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> [@Bug - changing reference path does not update tag historian value](https://forum.inductiveautomation.com/t/bug-changing-reference-path-does-not-update-tag-historian-value/43411):
>
> Ignition 8.1.0 Changing the path of a reference tag does change the tag value. But the historian is not updated. The Ignition historian tags will not update until the new referenced tag has been changed. Is there any way to force the tag to update in the historian?

This is a more clear post. However, IA haven't clarified whether this is a bug

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