# "MusicBrainz Composer Id" not mapped for MP3

**URL:** https://community.mp3tag.de/t/musicbrainz-composer-id-not-mapped-for-mp3/71933
**Category:** General Discussion
**Tags:** feature
**Created:** [October 8, 2026, 1:09pm UTC](https://community.mp3tag.de/t/musicbrainz-composer-id-not-mapped-for-mp3/71933 "2026-10-08T13:09:29Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![squonk57](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/s/4491bb/32.png) [@squonk57](https://community.mp3tag.de/u/squonk57)
#### Post date: [October 8, 2026, 1:36pm UTC](https://community.mp3tag.de/t/musicbrainz-composer-id-not-mapped-for-mp3/71933/5 "2026-10-08T13:36:54Z")

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Thanks for the suggestion. That lets me change the field _contents_ (i.e. "7a8dbe84-f4c0-4457-bfa3-edced1f8cde0" ↔ "7A8DBE84-F4C0-4457-BFA3-EDCED1F8CDE0"), not how the frame _name_ is stored.

Basically this is the same as [Writing back MusicBrainz IDs in all Uppercase?](https://community.mp3tag.de/t/writing-back-musicbrainz-ids-in-all-uppercase/18405) , just with another frame.

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_[View the full topic](https://community.mp3tag.de/t/musicbrainz-composer-id-not-mapped-for-mp3/71933)._