cubicweb-file #3495053 removing rtag ... undefined in schema [open]

After upgrading to the latest version of cubicweb-file, we get such errors in applications using this cube:

(cubicweb.rtags) WARNING: removing rtag ('File', 'data_thumbnail', '*', 'subject'): set(['main_hidden']), data_thumbnail undefined in schema
(cubicweb.rtags) WARNING: removing rtag ('File', 'data_thumbnail', '*', 'subject'): hidden, data_thumbnail undefined in schema

prioritynormal
typebug
done in<not specified>
closed by<not specified>