# When a new forescast is created, it overwrite the older forecast? **URL:** \ **Category:** Kibana\ **Tags:** elastic-stack-machine-learning\ **Created:** [June 22, 2020, 3:38pm UTC](https://discuss.elastic.co/t/when-a-new-forescast-is-created-it-overwrite-the-older-forecast/238117 "2020-06-22T15:38:25Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Incauto](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/incauto/32/60149_2.png) [@Incauto](https://discuss.elastic.co/u/Incauto)\ **Post date:** [June 22, 2020, 3:38pm UTC](https://discuss.elastic.co/t/when-a-new-forescast-is-created-it-overwrite-the-older-forecast/238117/1 "2020-06-22T15:38:26Z")
If I run a 7 days forecast on monday, an then on tuesday I run another 7 days forecast it will overwrite the old one? I ask this because I have a visualization (on a dashboard) of the forecast that covers 7days an to have it full of data I have a python script that will run every day and create the forecast ---
**Author:** ![sophie\_chang](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sophie_chang/32/18008_2.png) [@sophie\_chang](https://discuss.elastic.co/u/sophie_chang)\ **Post date:** [June 22, 2020, 4:31pm UTC](https://discuss.elastic.co/t/when-a-new-forescast-is-created-it-overwrite-the-older-forecast/238117/2 "2020-06-22T16:31:57Z")
Hi @Incauto Each forecast will have a unique `forecast_id` .. old forecasts will not be overwritten, but your visualisation will need to filter on the desired `forecast_id`. Hope that helps Sophie ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 20, 2020, 4:32pm UTC](https://discuss.elastic.co/t/when-a-new-forescast-is-created-it-overwrite-the-older-forecast/238117/3 "2020-07-20T16:32:13Z")
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