MiQ Generic Worker traceback

evm.log

...
[----] I, [2017-09-19T06:34:45.962417 #55145:467134]  INFO -- : MIQ(MiqQueue.put) Message id: [367811],  id: [], Zone: [
default], Role: [], Server: [], Ident: [generic], Target id: [], Instance id: [7], Task id: [], Command: [ManageIQ::Prov
iders::Openstack::CloudManager.sync_cloud_tenants_with_tenants], Timeout: [600], Priority: [100], State: [ready], Delive
r On: [], Data: [], Args: []
...
[----] I, [2017-09-19T06:34:51.119265 #55458:467134]  INFO -- : MIQ(MiqGenericWorker::Runner#get_message_via_drb) Messag
e id: [367811], MiqWorker id: [10709], Zone: [default], Role: [], Server: [], Ident: [generic], Target id: [], Instance 
id: [7], Task id: [], Command: [ManageIQ::Providers::Openstack::CloudManager.sync_cloud_tenants_with_tenants], Timeout: 
[600], Priority: [100], State: [dequeue], Deliver On: [], Data: [], Args: [], Dequeued in: [5.167517768] seconds
[----] I, [2017-09-19T06:34:51.119362 #55458:467134]  INFO -- : MIQ(MiqQueue#deliver) Message id: [367811], Delivering..
.
[----] E, [2017-09-19T06:34:51.128385 #55458:467134] ERROR -- : MIQ(MiqQueue#deliver) Message id: [367811], Error: [Vali
dation failed: Name should be unique per parent]
[----] E, [2017-09-19T06:34:51.128516 #55458:467134] ERROR -- : [ActiveRecord::RecordInvalid]: Validation failed: Name s
hould be unique per parent  Method:[rescue in deliver]
[----] E, [2017-09-19T06:34:51.128588 #55458:467134] ERROR -- : /opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_r
ecord/validations.rb:78:in `raise_validation_error'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/validations.rb:50:in `save!'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/attribute_methods/dirty.rb:30:in `save!'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:324:in `block in save!'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:395:in `block in with_transaction_returnin
g_status'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:230:in
 `transaction'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:211:in `transaction'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:392:in `with_transaction_returning_status'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:324:in `save!'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/suppressor.rb:45:in `save!'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/persistence.rb:288:in `block in update!'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:395:in `block in with_transaction_returnin
g_status'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:232:in
 `block in transaction'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:189:in `within
_new_transaction'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:232:in
 `transaction'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:211:in `transaction'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/transactions.rb:392:in `with_transaction_returning_status'
/opt/rh/cfme-gemset/gems/activerecord-5.0.3/lib/active_record/persistence.rb:286:in `update!'
/var/www/miq/vmdb/app/models/manageiq/providers/cloud_manager.rb:124:in `sync_root_tenant'
/var/www/miq/vmdb/app/models/manageiq/providers/cloud_manager.rb:65:in `sync_cloud_tenants_with_tenants'
/var/www/miq/vmdb/app/models/miq_queue.rb:364:in `block in deliver'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:91:in `block in timeout'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:33:in `block in catch'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:33:in `catch'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:33:in `catch'
/opt/rh/rh-ruby23/root/usr/share/ruby/timeout.rb:106:in `timeout'
/var/www/miq/vmdb/app/models/miq_queue.rb:360:in `deliver'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:115:in `deliver_queue_message'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:143:in `deliver_message'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:161:in `block in do_work'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:155:in `loop'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:155:in `do_work'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:340:in `block in do_work_loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:337:in `loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:337:in `do_work_loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:160:in `run'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:134:in `start'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:21:in `start_worker'
/var/www/miq/vmdb/app/models/miq_worker.rb:339:in `block in start_runner'
/opt/rh/cfme-gemset/gems/nakayoshi_fork-0.0.3/lib/nakayoshi_fork.rb:24:in `fork'
/opt/rh/cfme-gemset/gems/nakayoshi_fork-0.0.3/lib/nakayoshi_fork.rb:24:in `fork'
/var/www/miq/vmdb/app/models/miq_worker.rb:337:in `start_runner'
/var/www/miq/vmdb/app/models/miq_worker.rb:348:in `start'
/var/www/miq/vmdb/app/models/miq_worker.rb:266:in `start_worker'
/var/www/miq/vmdb/app/models/miq_worker.rb:150:in `block in sync_workers'
/var/www/miq/vmdb/app/models/miq_worker.rb:150:in `times'
/var/www/miq/vmdb/app/models/miq_worker.rb:150:in `sync_workers'
/var/www/miq/vmdb/app/models/miq_server/worker_management/monitor.rb:53:in `block in sync_workers'
/var/www/miq/vmdb/app/models/miq_server/worker_management/monitor.rb:50:in `each'
/var/www/miq/vmdb/app/models/miq_server/worker_management/monitor.rb:50:in `sync_workers'
/var/www/miq/vmdb/app/models/miq_server.rb:160:in `start'
/var/www/miq/vmdb/app/models/miq_server.rb:252:in `start'
/var/www/miq/vmdb/lib/workers/evm_server.rb:65:in `start'
/var/www/miq/vmdb/lib/workers/evm_server.rb:91:in `start'
/var/www/miq/vmdb/lib/workers/bin/evm_server.rb:4:in `<main>'
[----] I, [2017-09-19T06:34:51.128692 #55458:467134]  INFO -- : MIQ(MiqQueue#delivered) Message id: [367811], State: [er
ror], Delivered in [0.009327733] seconds