cubicweb-conference #2469523 yams._exceptions.ValidationError: 1362 (pkey-subject): unknown property key boxes.blog_summary_box.visible [validation pending]

When creating an instance that uses cubicweb-conference I get

-> storing the schema in the database  [................... ]
Traceback (most recent call last):
File "/usr/bin/cubicweb-ctl", line 4, in <module>
  run(sys.argv[1:])
File "/home/arthur/src/public/cubicweb/cubicweb/cwctl.py", line 1017, in run
  CWCTL.run(args)
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 134, in run
  sys.exit(command.main_run(args, rcfile))
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 263, in main_run
  self.run(args)
File "/home/arthur/src/public/cubicweb/cubicweb/server/serverctl.py", line 398, in run
  str(self.config.config_level), config.appid])
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 134, in run
  sys.exit(command.main_run(args, rcfile))
File "/home/arthur/src/public/cubicweb/logilab/common/clcommands.py", line 263, in main_run
  self.run(args)
File "/home/arthur/src/public/cubicweb/cubicweb/server/serverctl.py", line 457, in run
  init_repository(config, drop=self.config.drop)
File "/home/arthur/src/public/cubicweb/cubicweb/server/__init__.py", line 239, in init_repository
  initialize_schema(config, schema, handler)
File "/home/arthur/src/public/cubicweb/cubicweb/server/__init__.py", line 277, in initialize_schema
  mhandler.cmd_exec_event_script('post%s' % event, cube)
File "/home/arthur/src/public/cubicweb/cubicweb/server/migractions.py", line 380, in cmd_exec_event_script
  return self.cmd_process_script(apc, funcname, *args, **kwargs)
File "/home/arthur/src/public/cubicweb/cubicweb/server/migractions.py", line 160, in cmd_process_script
  migrscript, funcname, *args, **kwargs)
File "/home/arthur/src/public/cubicweb/cubicweb/migration.py", line 350, in cmd_process_script
  execfile(migrscript, scriptlocals)
File "/home/arthur/src/public/cubicweb/cubes/conference/migration/postcreate.py", line 5, in <module>
  set_property('boxes.blog_summary_box.visible', u'')
File "/home/arthur/src/public/cubicweb/cubicweb/migration.py", line 137, in <lambda>
  meth=meth)
File "/home/arthur/src/public/cubicweb/cubicweb/migration.py", line 203, in interact
  return meth(*args, **kwargs)
File "/home/arthur/src/public/cubicweb/cubicweb/server/migractions.py", line 1322, in cmd_set_property
  self.cmd_create_entity('CWProperty', pkey=unicode(pkey), value=value)
File "/home/arthur/src/public/cubicweb/cubicweb/server/migractions.py", line 1359, in cmd_create_entity
  entity = self._cw.create_entity(etype, **kwargs)
File "/home/arthur/src/public/cubicweb/cubicweb/req.py", line 143, in create_entity
  return cls.cw_instantiate(self.execute, **kwargs)
File "/home/arthur/src/public/cubicweb/cubicweb/entity.py", line 510, in cw_instantiate
  created = execute(rql, qargs).get_entity(0, 0)
File "/home/arthur/src/public/cubicweb/cubicweb/server/session.py", line 916, in execute
  rset = self._execute(self, rql, kwargs, build_descr)
File "/home/arthur/src/public/cubicweb/cubicweb/server/querier.py", line 736, in execute
  results = plan.execute()
File "/home/arthur/src/public/cubicweb/cubicweb/server/querier.py", line 202, in execute
  result = step.execute()
File "/home/arthur/src/public/cubicweb/cubicweb/server/ssplanner.py", line 508, in execute
  result = self.plan.insert_entity_defs()
File "/home/arthur/src/public/cubicweb/cubicweb/server/querier.py", line 553, in insert_entity_defs
  for edef in row])
File "/home/arthur/src/public/cubicweb/cubicweb/server/repository.py", line 1393, in glob_add_entity
  self.hm.call_hooks('after_add_entity', session, entity=entity)
File "/home/arthur/src/public/cubicweb/cubicweb/server/hook.py", line 414, in call_hooks
  registry.call_hooks(event, session, **kwargs)
File "/home/arthur/src/public/cubicweb/cubicweb/server/hook.py", line 335, in call_hooks
  hook()
File "/home/arthur/src/public/cubicweb/cubicweb/hooks/syncsession.py", line 170, in __call__
  raise ValidationError(self.entity.eid, {qname: msg})
yams._exceptions.ValidationError: 1362 (pkey-subject): unknown property key boxes.blog_summary_box.visible
prioritynormal
typebug
done in0.12.1
load0.100
load left0.000
closed by#45cfa7d8baa3 [postcreate] wrong box name removed (closes #2469523)