# how to detect, be alerted and CLEAN&erase the meta tag or extra field ?

**URL:** <https://community.mp3tag.de/t/how-to-detect-be-alerted-and-clean-erase-the-meta-tag-or-extra-field/18746>\
**Category:** Support\
**Created:** [February 24, 2017, 11:18am UTC](https://community.mp3tag.de/t/how-to-detect-be-alerted-and-clean-erase-the-meta-tag-or-extra-field/18746 "2017-02-24T11:18:38Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\
**Post date:** [February 24, 2017, 1:16pm UTC](https://community.mp3tag.de/t/how-to-detect-be-alerted-and-clean-erase-the-meta-tag-or-extra-field/18746/3 "2017-02-24T13:16:14Z")

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> [@usamike](#):
>
> hi,
> 
> i have some bad mp3 file which are not correctly tag.  
> But i don't know which they are, so i discover them one by one (because it causes bugs on tablets, mp3 players, smartphone and librayry software).  
> ...

I have not seen any "illegal" fields in any of the screendumps.  
What I do see is that some kind of strange software shows a picture as bytes instead of the picture.

Did you know that there is an action called  
"Remove fields except" [https://docs.mp3tag.de/actions/remove-fields-except](https://docs.mp3tag.de/actions/remove-fields-except)

In this action you enter all the field names for the fields that you want to keep and the rest gets removed.  
Yet, there is no "alert" - as the fields that you showed are perfectly legal and valid.

Like in the thread of your's  
[remove cover does not remove the tag field COVERART](https://community.mp3tag.de/t/18743/5)  
it is now down to you to first take care of your files' structure and integrity.

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