cubicweb #3539204 ldapfeed: CRITICAL: error while creating CWUser: 2484 (login-subject): the value "..." is already used, use another one [open]

I get lots of such erors in the logs of a CubicWeb instance that's using ldapfeed:

2014-02-11 12:10:47 - (cubicweb.sources.Imagen) CRITICAL: error while creating CWGroup: 2490 (name-subject): the value "partners" is already used, use another one
2014-02-11 12:10:47 - (cubicweb.sources.Imagen) ERROR: error while creating CWGroup: 2490 (name-subject): the value "partners" is already used, use another one
2014-02-11 12:15:54 - (cubicweb.sources.Imagen) CRITICAL: error while creating CWUser: 2492 (login-subject): the value "..." is already used, use another one
2014-02-11 12:15:54 - (cubicweb.sources.Imagen) ERROR: error while creating CWUser: 2492 (login-subject): the value "..." is already used, use another one

I have just created the instance and configured the ldapfeed source. I don't understand why I see such errors.

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