Validation error on mtli_filesize

  • Hello,

    first of all I want to thank for this great plugin.

    I have a question dealing with validation error:

    Error: Bad value mtli_filesize180kB for attribute rel on element a: The string mtli_filesize180kB is not a registered keyword.

    I got this everywhere I add pdf-files. Is there an option or filter how I can get rid of it?

    Best wishes, Daniel

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