# Getting this error in Speedrun tutorial

**URL:** <https://community.palantir.com/t/getting-this-error-in-speedrun-tutorial/7287>\
**Category:** Ask the Community\
**Tags:** pipeline-builder\
**Created:** [September 28, 2026, 3:09pm UTC](https://community.palantir.com/t/getting-this-error-in-speedrun-tutorial/7287 "2026-09-28T15:09:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sauravshrestha](https://avatars.discourse-cdn.com/v4/letter/s/73ab20/32.png) [@sauravshrestha](https://community.palantir.com/u/sauravshrestha)\
**Post date:** [September 28, 2026, 3:09pm UTC](https://community.palantir.com/t/getting-this-error-in-speedrun-tutorial/7287/1 "2026-09-28T15:09:20Z")

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Clean Office Goods

Go to node

Board 1: Cast to Timestamp

Output contains legacy datetime columns (orderPlacementDate). Consider using the ‘Convert legacy OffsetDateTime’ expression to convert them.

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**Author:** ![helenq](https://avatars.discourse-cdn.com/v4/letter/h/a4c791/32.png) [@helenq](https://community.palantir.com/u/helenq)\
**Post date:** [September 28, 2026, 3:22pm UTC](https://community.palantir.com/t/getting-this-error-in-speedrun-tutorial/7287/2 "2026-09-28T15:22:05Z")

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Hi it looks like from the error the type of your column is a legacy datetime type. Can you try using the “Convert legacy OffsetDateTime” expression instead? Or are you running into issues with using that?