# Undeclared attribute type for enum 'sync\_type'. Enums must be backed by a database column or declared with an explicit type via \`attribute\`

**URL:** <https://meta.discourse.org/t/undeclared-attribute-type-for-enum-sync-type-enums-must-be-backed-by-a-database-column-or-declared-with-an-explicit-type-via-attribute/326714>\
**Category:** Product Support\
**Created:** [September 16, 2024, 5:09pm UTC](https://meta.discourse.org/t/undeclared-attribute-type-for-enum-sync-type-enums-must-be-backed-by-a-database-column-or-declared-with-an-explicit-type-via-attribute/326714 "2024-09-16T17:09:27Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![saulshanabrook](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/saulshanabrook/32/292864_2.png) [@saulshanabrook](https://meta.discourse.org/u/saulshanabrook)\
**Post date:** [October 8, 2024, 5:55pm UTC](https://meta.discourse.org/t/undeclared-attribute-type-for-enum-sync-type-enums-must-be-backed-by-a-database-column-or-declared-with-an-explicit-type-via-attribute/326714/7 "2024-10-08T17:55:20Z")

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Did you figure out how to upgrade your site with this error? I am also getting it.

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