issues creation missing iid about tracboat HOT 6 CLOSED

irb(main):039:0> Issue.find_by(id: 7956).delete
NoMethodError: undefined method `state' for #<ActiveRecord::ConnectionAdapters::NullTransaction:0x007f762ba92bc8>
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.8/lib/active_record/connection_adapters/abstract/database_statements.rb:238:in `transaction_state'
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.8/lib/active_record/transactions.rb:335:in `add_to_transaction'
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/paranoia-2.2.0/lib/paranoia.rb:96:in `delete'
        from (irb):39
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/console.rb:110:in `start'
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/console.rb:9:in `start'
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:68:in `console'
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
        from /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/commands.rb:17:in `<top (required)>'
        from bin/rails:9:in `require'
        from bin/rails:9:in `<main>'
irb(main):040:0> 

irb(main):052:0> Issue.where(iid: nil).size
=> 520

irb(main):060:0> for issue in Issue.where(iid: nil) do puts issue.destroy end
#<Issue:0x007f7632aec658>
#<Issue:0x007f7632ac5bc0>
...