# Emoncms, set an old data value after data loss

**URL:** <https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931>\
**Category:** Emoncms\
**Created:** [23 November 2022 15:31 UTC](https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931 "2022-11-23T15:31:14Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![uro53](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/uro53/32/19658_2.png) [@uro53](https://community.openenergymonitor.org/u/uro53)\
**Post date:** [23 November 2022 15:31 UTC](https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931/1 "2022-11-23T15:31:15Z")

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Hi all,  
is it possible to set an old data value (feed) after data loss as the base for the new accumulation?  
Thanks  
Uwe

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**Author:** ![TrystanLea](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/trystanlea/32/31_2.png) [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\
**Post date:** [23 November 2022 16:10 UTC](https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931/2 "2022-11-23T16:10:43Z")

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Hello @uro53 yes if you go to the feed api helper (top-right feeds page) and select insert new data point, then set the new value to the value you need and just leave time as 0, then click ‘Try’ the latest feed value will update.

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**Author:** ![uro53](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/uro53/32/19658_2.png) [@uro53](https://community.openenergymonitor.org/u/uro53)\
**Post date:** [23 November 2022 17:42 UTC](https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931/3 "2022-11-23T17:42:55Z")

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Thanks for the quick answer

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**Author:** ![uro53](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/uro53/32/19658_2.png) [@uro53](https://community.openenergymonitor.org/u/uro53)\
**Post date:** [16 February 2023 09:09 UTC](https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931/4 "2023-02-16T09:09:11Z")

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Hello,  
the procedure described here was working fine last time. Now I have the same issue but the old values were not inserted.  
What goes wrong?  
Regards

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**Author:** ![uro53](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/uro53/32/19658_2.png) [@uro53](https://community.openenergymonitor.org/u/uro53)\
**Post date:** [16 February 2023 09:19 UTC](https://community.openenergymonitor.org/t/emoncms-set-an-old-data-value-after-data-loss/21931/5 "2023-02-16T09:19:07Z")

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solved