Error setting InitialEditCaptureTime to null

[registryLogE]

An error displays when removing tag InitialEditCaptureTime by setting the value to null:

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Warning: Tag 'XMP-kbrg:InitialEditCaptureTime' is not defined
Nothing to do.


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exiftool.exe -XMP:XMP-kbrg:InitialEditCaptureTime= FILE.jpg


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exiftool.exe -u -G1 -v2 FILE.jpg
  ExifToolVersion = 12.67
  FileName = FILE.jpg
JPEG APP1 (5898 bytes):
  + [XMP directory, 5869 bytes]
  | [adding XMP-kbrg:InitialEditCaptureTime]
  | InitialEditCaptureTime = 2023-01-01T01:01:01-00:00
  | - Tag 'x:xmpmeta/rdf:RDF/rdf:Description/kbrg:InitialEditCaptureTime'

<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 9.1-c001 79.a8d4753, 2023/03/23-08:56:37        ">
  <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
      <rdf:Description rdf:about=""
            xmlns:dc="http://purl.org/dc/elements/1.1/"
            xmlns:kbrg="http://ns.adobe.com/bridge/1.0/"
            xmlns:xmp="http://ns.adobe.com/xap/1.0/"
            xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/"
            xmlns:stRef="http://ns.adobe.com/xap/1.0/sType/ResourceRef#"
            xmlns:stEvt="http://ns.adobe.com/xap/1.0/sType/ResourceEvent#"
            xmlns:photoshop="http://ns.adobe.com/photoshop/1.0/"
            xmlns:exif="http://ns.adobe.com/exif/1.0/"
            xmlns:tiff="http://ns.adobe.com/tiff/1.0/">
        <dc:format>image/jpeg</dc:format>
        <kbrg:InitialEditCaptureTime>2023-01-01T01:01:01-00:00</kbrg:InitialEditCaptureTime>
        <xmp:CreatorTool>Adobe Photoshop 25.0 (Windows)</xmp:CreatorTool>
Any help is appreciated.

[registryLogE]

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exiftool.exe -XMP-kbrg:all= FILE.jpg
The above command removed the 'kbrg' tags, including the InitialEditCaptureTime.

[StarGeek]

Exiftool can't edit tags it doesn't know about.  As the error says, that tag is not defined. Exiftool doesn't have a definition for any tag in the XMP-kbrg group.  Doing a search with several different search engines pulls up this post as the only source of "XMP-kbrg".

Do you have any information about what program wrote this data?

[Phil Harvey]

You can create user-defined tags for any tags you want to write (or delete) that aren't already in ExifTool's list of standard tags.  See the example config file for examples on how to use a config file to define new tags.

- Phil