# Quality change cause historian log tag value **URL:** \ **Category:** Ignition\ **Created:** [December 3, 2020, 9:43pm UTC](https://forum.inductiveautomation.com/t/quality-change-cause-historian-log-tag-value/41189 "2020-12-03T21:43:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![nader.chinichian](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nader.chinichian/32/9261_2.png) [@nader.chinichian](https://forum.inductiveautomation.com/u/nader.chinichian)\ **Post date:** [December 3, 2020, 9:43pm UTC](https://forum.inductiveautomation.com/t/quality-change-cause-historian-log-tag-value/41189/1 "2020-12-03T21:43:21Z")
Hi, If I active history for a digital tag with mode set to log only on change value. The problem is each time i lost my opc connection ignition log the tag even though the tag value doesn’t change. It seems historian also detect tag change for quality change. This cause in the event report I see a lot of repeated values. Is there a way that prevent this behavior? ---
**Author:** ![Dmart](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dmart/32/13427_2.png) [@Dmart](https://forum.inductiveautomation.com/u/Dmart)\ **Post date:** [May 9, 2023, 3:11pm UTC](https://forum.inductiveautomation.com/t/quality-change-cause-historian-log-tag-value/41189/2 "2023-05-09T15:11:21Z")
Did you ever find a solution to this? I'm seeing the same problem. Thanks ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [May 9, 2023, 3:27pm UTC](https://forum.inductiveautomation.com/t/quality-change-cause-historian-log-tag-value/41189/3 "2023-05-09T15:27:48Z")
The solution is to make an expression tag that uses the `forceQuality()` function to always be "Good", and add history to that.