# Add parameter column to existing Runs

**URL:** <https://community.wandb.ai/t/add-parameter-column-to-existing-runs/5535>\
**Category:** W&B Help\
**Tags:** wandb\
**Created:** [December 13, 2023, 4:40pm UTC](https://community.wandb.ai/t/add-parameter-column-to-existing-runs/5535 "2023-12-13T16:40:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cemde](https://avatars.discourse-cdn.com/v4/letter/c/74df32/32.png) [@cemde](https://community.wandb.ai/u/cemde)\
**Post date:** [December 13, 2023, 4:40pm UTC](https://community.wandb.ai/t/add-parameter-column-to-existing-runs/5535/1 "2023-12-13T16:40:11Z")

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I ran an experiment with 1000 runs in it. Now I have changed my code to enable more fine-grained configuration of some run parameters. Is the a fast and easy way I can add this column to all existing runs with a particular value.

Example: You train 10 models, all with SGD, therefore you do not log “hparam/optimizer” explicitly in the config dictionary. Now you realise Adam exists and from now on you use “hparam/optimizer” to the config dictionary. To keep a clear record of past trained models, you would like to add the column “hparam/optimizer” with values “SGD” to all existing runs.

What is the recommended way of doing that?

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**Author:** ![joana-marie](https://avatars.discourse-cdn.com/v4/letter/j/f6c823/32.png) [@joana-marie](https://community.wandb.ai/u/joana-marie)\
**Post date:** [December 18, 2023, 7:36am UTC](https://community.wandb.ai/t/add-parameter-column-to-existing-runs/5535/2 "2023-12-18T07:36:54Z")

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Hi @cemde  
Happy to help. The best approach that we recommend is using our API to update your run configuration. Please see the following [page](https://docs.wandb.ai/guides/track/public-api-guide#update-config-for-an-existing-run) for example on how to do it.

If you are also interested to update the summary of a run, you can check this [pages](https://docs.wandb.ai/guides/track/public-api-guide#update-summary-metrics) here.

Please let me know if you have any questions.

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**Author:** ![joana-marie](https://avatars.discourse-cdn.com/v4/letter/j/f6c823/32.png) [@joana-marie](https://community.wandb.ai/u/joana-marie)\
**Post date:** [December 20, 2023, 10:22am UTC](https://community.wandb.ai/t/add-parameter-column-to-existing-runs/5535/3 "2023-12-20T10:22:57Z")

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Hi @cemde , since we have not heard back from you we are going to close this request. If you would like to re-open the conversation, please let us know!

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**Author:** ![system](https://us1.discourse-cdn.com/flex020/uploads/wandb/original/1X/366b649231631dbab896843020da0056074ac79d.png) [@system](https://community.wandb.ai/u/system)\
**Post date:** [February 18, 2024, 10:23am UTC](https://community.wandb.ai/t/add-parameter-column-to-existing-runs/5535/4 "2024-02-18T10:23:43Z")

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