cubicweb #843152 Unknown user/group for data files in /etc [rejected]

Using etckeeper I get the following warning

Bad owner for chown UNKNOWN './cubicweb.d/hgpycot/data'
Bad owner for chown UNKNOWN './cubicweb.d/hgpycot/data/banner.png'
[...]

ls on these files gives no user/group for the ids used : 1031

prioritynormal
typebug
done in<not specified>
load0.000
load left0.000
closed by<not specified>