When you have a plugin like extended description providing a rendered version of the label, you're blocked because the tag manager only shows you a rendered version. It is thus impossible to modify the raw version.
Tag manager and Extended Description: you cannot modify the raw version
This is a GitHub Issue
repo:Piwigo
owner:Piwigo
Title : Tag manager and Extended Description: you cannot modify the raw version
Issue date:

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When you have a plugin like extended description providing a rendered version of the label, you're blocked because the tag manager only shows you a rendered version. It is thus impossible to modify the raw version.
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