# Production 2026.03 Deployment Error

**URL:** <https://community.hubspot.com/t/production-2026-03-deployment-error/148046>\
**Category:** CMS Development\
**Created:** [April 6, 2026, 2:28pm UTC](https://community.hubspot.com/t/production-2026-03-deployment-error/148046 "2026-04-06T14:28:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DOsborn](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/dosborn/32/48852_2.png) [@DOsborn](https://community.hubspot.com/u/DOsborn)\
**Post date:** [April 6, 2026, 2:28pm UTC](https://community.hubspot.com/t/production-2026-03-deployment-error/148046/1 "2026-04-06T14:28:45Z")

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I upgraded my project from 2025.01 to 2026.03 in my dev environment and tested everything out. This morning I went to upload the 2026.03 version to production using “hs project upload --account=myprod”. The build was successful, but the deployment failed. Doing the hs project deploy I get “-Build ‘16’ cannot be deployed from version ‘2025.1’ to version ‘2026.03’”  
What is the proper way to now get this updated into production? Do I need to do an hs project migrate on the prod account as well?

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**Author:** ![STierney](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/stierney/32/186066_2.png) [@STierney](https://community.hubspot.com/u/STierney)\
**Post date:** [April 6, 2026, 7:55pm UTC](https://community.hubspot.com/t/production-2026-03-deployment-error/148046/2 "2026-04-06T19:55:26Z")

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Hey @DOsborn,  
Thanks for posting in the Community!  
I’d like to tag in some dev experts to see what insight they can provide here! @alyssamwilie, @SteveHTM, and @evaldas - are you aware of the best way to get this updated in production?  
Shane, Senior Community Moderator