[X] ARTIST cannot be updated

[DetlevD]

@wolfsong

I've tried everything. This happens with every file I've tried. ... when I use Convert Tag -> Tag using $meta(ARTIST,0) as the format string for the artist field ... both the tag panel and results still show both artists. The extended tags also lists both artists.

See also ...
/t/12626/1
/t/13494/1
/t/15443/1

Still the rule is ...
"A multi-value tag-field can not be overwritten with its own first value alone."
... but ...
"A multi-value tag-field can not be overwritten with its own first value alone."
... when you are doing it this way ...

ARTIST <== $meta(ARTIST,0)'\\\\'

DD.20150727.0925.CEST