The tag alias #71623 marks_on_body -> markings has been rejected.

Reason: markings

EDIT: The tag alias marks_on_body -> markings (forum #410812) has been rejected by @spe.

marks_on_body seems a bit ambiguous, with some posts using it to refer to scratches, scars, and other such things:
post #4816693 post #4816777
Marks of physical injuries on the body instead of patterns and designs like what markings is intended for.

Would it be better if the alias was changed to invalid or a disambiguation (marks_(disambiguation)) instead?

The tag alias marks_on_body -> markings (forum #410812) has been rejected by @spe.