Problem with plone.app.referenceablebehavior during Copy Process

Hi all,
I want copy a custom folderish Dexterity Contenttype to another Place in my Plone 4.3.14 Site.

I ended in the following Traceback:

2017-08-07T11:04:01 WARNING OFS.Uninstalled Could not import class 'Reference' from module 'plone.app.referenceablebehavior.referenceable'
------
2017-08-07T11:04:20 ERROR Zope.SiteErrorLog 1502096660.380.252876308301 http://xxx/manage_pasteObjects
Traceback (innermost last):
  Module ZPublisher.Publish, line 138, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 48, in call_object
  Module OFS.CopySupport, line 232, in manage_pasteObjects
  Module plone.dexterity.content, line 233, in _getCopy
  Module OFS.CopySupport, line 589, in _getCopy
  Module ZODB.ExportImport, line 92, in importFile
  Module transaction._transaction, line 260, in savepoint
  Module transaction._transaction, line 257, in savepoint
  Module transaction._transaction, line 690, in __init__
  Module ZODB.Connection, line 1125, in savepoint
  Module ZODB.Connection, line 587, in _commit
  Module ZODB.ExportImport, line 176, in _importDuringCommit
ImportError: No module named referenceablebehavior.referenceable

I didn't need this Module, because i didn't use "Archetypes" in my Site. If i add the Package 'plone.app.referenceablebehavior' to my buildout, all is fine! Is this a Bug or is this Package really needed?