# Mp3tag is not saving the right ITUNESCATALOGID to files
**URL:** https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185
**Category:** Fixed Bugs
**Tags:** bug-fixed
**Created:** [May 6, 2026, 9:38pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185 "2026-05-06T21:38:39Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@cleo](https://community.mp3tag.de/u/cleo)
#### Post date: [May 6, 2026, 9:38pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/1 "2026-05-06T21:38:39Z")
Hi, I have been experiencing an issue with Mp3tag.
When I add the ITUNESCATALOGID tag to my M4A files, Mp3tag doesn't save the right one.
I recently added 4 songs from ROSALÍA's album LUX (Complete Works) ([Dios Es Un Stalker](https://music.apple.com/fr/song/dios-es-un-stalker-versi%C3%B3n-francotiradora/6762232885), Focu 'Ranni, Jeanne & Novia Robot) but every time I try to add the ITUNESCATALOGID and save, it's saving a different one and it starts with a 2.
The same issue is also happening with the song [Bring Your Love](https://music.apple.com/fr/song/bring-your-love/6763400211) by Madonna and Sabrina Carpenter.
It only happens with songs released recently with an ITUNESCATALOGID that start with a 6 but nothing happens if it starts with a 1 like for the song I'm Perfect by Olivia O'Brien.
With the wrong ITUNESCATALOGID the songs cannot be matched on Apple Music when I sync them on my iPhone.
I have attached screenshots of the ITUNESCATALOGID tag before and after saving in Mp3tag.
And also I add my songs on iTunes.
Thanks!
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### Author:  [@cleo](https://community.mp3tag.de/u/cleo)
#### Post date: [May 6, 2026, 9:41pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/2 "2026-05-06T21:41:37Z")
The screenshots for [Bring Your Love](https://music.apple.com/fr/song/bring-your-love/6763400211) by Madonna and Sabrina Carpenter.
The screenshot for [I'm Perfect](https://music.apple.com/fr/song/im-perfect/1893181359) by Olivia O'Brien.
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### Author:  [@poster](https://community.mp3tag.de/u/poster)
#### Post date: [May 7, 2026, 4:59am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/3 "2026-05-07T04:59:48Z")
How do you add the content of the field `ITUNESCATALOGID` in Mp3tag? Do you use a websource script or do you add it manually?
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### Author:  [@cleo](https://community.mp3tag.de/u/cleo)
#### Post date: [May 7, 2026, 6:43am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/4 "2026-05-07T06:43:09Z")
I use an Apple Music web script, but I have tried deleting the field and doing it manually and the issue is still happening.
---
### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [May 7, 2026, 7:00am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/5 "2026-05-07T07:00:08Z")
I can confirm that if you add an `ITUNESCATALOGID` like
**6763400211**
to an M4A file, it will be stored wrongly as
**2468432915**
You can reproduce it manually.
This doesn't happen with other formats, such as MP3.
BTW: It seems, that only numbers starting with 6 and higher followed by 9 numbers are affected:
6000000001 -\> 1705032705
6000000002 -\> 1705032706
...
6000000009 -\> 1705032713
6000000010 -\> 1705032714
...
7000000001 -\> 2705032705
8000000001 -\> 3705032705
9000000001 -\> 410065409
---
### Author:  [@cleo](https://community.mp3tag.de/u/cleo)
#### Post date: [May 7, 2026, 7:12am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/6 "2026-05-07T07:12:36Z")
Thank you for confirming that's exactly the issue I'm dealing with
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [May 7, 2026, 7:53am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/7 "2026-05-07T07:53:01Z")
Those IDs exceed the maximum size for 32-bit integers, which was until now the commonly agreed on storage format for iTunes Catalog IDs.
I'll need to investigate further and keep you posted.
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [May 7, 2026, 3:34pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/8 "2026-05-07T15:34:01Z")
I've just released **Mp3tag v3.34.1** , which now detects if the integer value is larger than the preferred preferred storage width and preserves the data.
Thanks for reporting!
---
### Author:  [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [May 7, 2026, 5:19pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/9 "2026-05-07T17:19:31Z")
> [@LyricsLover](#):
>
> ... 9000000001
This works for my **test.m4a** file - numbers greater than 6000000001 are saved correctly.
And for you @cleo?
---
### Author:  [@cleo](https://community.mp3tag.de/u/cleo)
#### Post date: [May 7, 2026, 7:59pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/10 "2026-05-07T19:59:07Z")
Hi, I just tried it and it worked.
Thank you so much!
---
### Author:  [@cleo](https://community.mp3tag.de/u/cleo)
#### Post date: [May 7, 2026, 8:00pm UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/11 "2026-05-07T20:00:44Z")
Yes, my files are now saved correctly too.
Thank you for your help!
---
### Author:  [@briansgriggs](https://community.mp3tag.de/u/briansgriggs)
#### Post date: [May 13, 2026, 1:26am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/12 "2026-05-13T01:26:36Z")
Hey Florian,
Is there a fix for the Mac version. I am seeing this same issue and I'm on the latest release 1.12.1 (136). Thx!
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [May 14, 2026, 7:00am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/13 "2026-05-14T07:00:13Z")
This is now also fixed with [Mp3tag for Mac v1.12.2](https://community.mp3tag.de/t/mp3tag-for-mac-v1-12-released/70982/5). Thanks for pointing!
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [June 11, 2026, 7:00am UTC](https://community.mp3tag.de/t/mp3tag-is-not-saving-the-right-itunescatalogid-to-files/71185/14 "2026-06-11T07:00:14Z")
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