# Ignition 8.1.2 - ManagedTag doesn't accept update value in the past

**URL:** <https://forum.inductiveautomation.com/t/ignition-8-1-2-managedtag-doesnt-accept-update-value-in-the-past/43431>\
**Category:** Module Development\
**Tags:** ignition80\
**Created:** [February 15, 2021, 8:20pm UTC](https://forum.inductiveautomation.com/t/ignition-8-1-2-managedtag-doesnt-accept-update-value-in-the-past/43431 "2021-02-15T20:20:38Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [February 17, 2021, 8:26pm UTC](https://forum.inductiveautomation.com/t/ignition-8-1-2-managedtag-doesnt-accept-update-value-in-the-past/43431/5 "2021-02-17T20:26:22Z")

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I've tested a deaband with 0.1 for **boolean** , but the tag timestamp change every second despide the state is True or False and doesn't change.

Some example:

> [@\[BUG\] Ignition 8.1.2 - lastchange property for tag expression updated at each execution](http://forum.inductiveautomation.com/t/bug-ignition-8-1-2-lastchange-property-for-tag-expression-updated-at-each-execution/43175):
>
> Ignition 8.1.2 We display path/to/tag.lastchange (inherited from 7.9/8.0) in some bindings. For gateway’s expression tag (with Tag Group Execution mode), lastchange tag property is updated every times Tag group is executed instead of when the tag value really change ! Seems to be a bug. Lastchange seem to be considered like Timestamp property

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