openrtb.2.6-202501.content.gtax_genres

What it means

OpenRTB 2.6-202501 introduced content.gtax, content.genres, which openRTB 2.6-202501 added genre taxonomy and genres fields on content..

Why it matters

content.gtax is only defined from 2.6-202501 onward. Used against an earlier version it is not valid, and a consumer below 2.6-202501 treats it as an unknown field.

How to fix it

Target OpenRTB 2.6-202501 or later when you send content.gtax, and make sure the value matches the type and any enum the specification defines for it.

Paste your bid request into the tester and select OpenRTB 2.6-202501 to see whether this rule fires against your payload.

Reference

• Specification section: Section 3.2.16
• Source: GitHub release notes: 2.6-202501

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