[gentoo-science] problem syncing the science overlay

Hello *,

For a couple of days I cannot sync the overlay:

dns ~ # layman -s science

  * Fetching remote list...
  * Fetch Ok

  * Syncing selected overlay(s)...
  * Running Git... # ( cd /var/lib/layman/science  && /usr/bin/git pull )
Warning: untrusted X11 forwarding setup failed: xauth key data not 
generated
error: cannot lock ref 'refs/remotes/origin/jlec/scilab': 
'refs/remotes/origin/jlec' exists; cannot create 
'refs/remotes/origin/jlec/scilab'
From git+ssh://git.gentoo.org/proj/sci
  ! [new branch]          jlec/scilab -> origin/jlec/scilab  (unable to 
update local ref)
  * Failure result returned from Git
  *
  * Errors:
  * ------
  * Failed to sync overlay "science".
  * Error was: Syncing overlay "science" returned status 1!
  * db.sync()
  *

  * CLI: Errors occurred processing action sync
  *
  * Errors:
  * ------
  * Failed to sync overlay "science".
  * Error was: Syncing overlay "science" returned status 1!
  * db.sync()

What has changed?

Andrey