svn check out chokes on something

[YannChemin]

A heekscad/branches/cleanup/translations/ko
svn: E155000: Failed to add directory '/home/yann/dev/heekscad/branches/cleanup/translations/ko/.svn': object of the same name as the administrative directory
yann@yann-ok:~/dev$ svn co https://github.com/Heeks/heekscad
svn: E235000: In file '/build/buildd/subversion-1.8.8/subversion/libsvn_wc/update_editor.c' line 1550: assertion failed (action == svn_wc_conflict_action_delete)
Aborted (core dumped)