# Library cleanup not case sensitive
**URL:** https://community.mp3tag.de/t/library-cleanup-not-case-sensitive/61274
**Category:** Support
**Created:** [June 15, 2023, 12:35pm UTC](https://community.mp3tag.de/t/library-cleanup-not-case-sensitive/61274 "2023-06-15T12:35:55Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mville](https://community.mp3tag.de/u/mville)
#### Post date: [June 15, 2023, 12:35pm UTC](https://community.mp3tag.de/t/library-cleanup-not-case-sensitive/61274/1 "2023-06-15T12:35:55Z")
A minor issue, but the library size will increase unnecessarily over time.
Library cleanup is not case sensitive. When a filename is edited, case only, a duplicate entry is created in the library (mp3tag.db3, mtfile table).
e.g., If I change file:
%myfilepath%\1.06 The Beatles - Lucy In The Sky With Diamonds.flac
to
%myfilepath%\1.06 The Beatles - Lucy in the Sky with Diamonds.flac
Two entries appear in the mtfile table for a single file reference. Cleanup does not resolve/remove the duplicate entry.
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [April 19, 2024, 9:07am UTC](https://community.mp3tag.de/t/library-cleanup-not-case-sensitive/61274/2 "2024-04-19T09:07:58Z")
> [@mville](#):
>
> When a filename is edited, case only, a duplicate entry is created in the library (mp3tag.db3, mtfile table).
I've just tried to reproduce this and it looks to me like the original filename is updated without creating a duplicate entry. This is also was I see in the code.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:30pm UTC](https://community.mp3tag.de/t/library-cleanup-not-case-sensitive/61274/3 "2026-02-09T12:30:05Z")