vagrant error 2

==> adm: Checking if box 'centos/7' is up to date...
==> adm: Clearing any previously set forwarded ports...
==> adm: Fixed port collision for 22 => 2222. Now on port 2200.
==> adm: Clearing any previously set network interfaces...
==> adm: Preparing network interfaces based on configuration...
    adm: Adapter 1: nat
    adm: Adapter 2: hostonly
==> adm: Forwarding ports...
    adm: 443 (guest) => 8443 (host) (adapter 1)
    adm: 22 (guest) => 2200 (host) (adapter 1)
==> adm: Running 'pre-boot' VM customizations...
==> adm: Booting VM...
==> adm: Waiting for machine to boot. This may take a few minutes...
    adm: SSH address: 127.0.0.1:2200
    adm: SSH username: vagrant
    adm: SSH auth method: private key
==> adm: Machine booted and ready!
==> adm: Checking for guest additions in VM...
    adm: No guest additions were detected on the base box for this VM! Guest
    adm: additions are required for forwarded ports, shared folders, host only
    adm: networking, and more. If SSH fails on this machine, please install
    adm: the guest additions and repackage the box to continue.
    adm:
    adm: This is not an error message; everything may continue to work properly,
    adm: in which case you may ignore this message.
==> adm: Setting hostname...
==> adm: Configuring and enabling network interfaces...
    adm: SSH address: 127.0.0.1:2200
    adm: SSH username: vagrant
    adm: SSH auth method: private key
==> adm: Rsyncing folder: /home/nick/whamcloud/Vagrantfiles/ => /vagrant
==> adm: Machine already provisioned. Run `vagrant provision` or use the `--provision`
==> adm: flag to force provisioning. Provisioners marked to run always will still run.
#<Thread:0x0000564f0c578b20@/usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/batch_action.rb:71 run> terminated with exception (report_on_exception is true):
Traceback (most recent call last):
    25: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/batch_action.rb:82:in `block (2 levels) in run'
    24: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/machine.rb:188:in `action'
    23: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/machine.rb:188:in `call'
    22: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/environment.rb:592:in `lock'
    21: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/machine.rb:202:in `block in action'
    20: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/machine.rb:227:in `action_raw'
    19: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/runner.rb:66:in `run'
    18: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/util/busy.rb:19:in `busy'
    17: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/runner.rb:66:in `block in run'
    16: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/builder.rb:116:in `call'
    15: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:34:in `call'
    14: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/plugins/providers/virtualbox/action/check_virtualbox.rb:17:in `call'
    13: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:34:in `call'
    12: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/builtin/call.rb:53:in `call'
    11: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/runner.rb:66:in `run'
    10: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/util/busy.rb:19:in `busy'
     9: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/runner.rb:66:in `block in run'
     8: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/builder.rb:116:in `call'
     7: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:34:in `call'
     6: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
     5: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:34:in `call'
     4: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/builtin/handle_box.rb:56:in `call'
     3: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:34:in `call'
     2: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
     1: from /usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/warden.rb:34:in `call'
/usr/share/rubygems-integration/all/gems/vagrant-2.0.2/lib/vagrant/action/builtin/config_validate.rb:18:in `call': There are errors in the configuration of this machine. Please fix (Vagrant::Errors::ConfigInvalid)
the following errors and try again:

Vagrant:
* Unknown configuration section 'trigger'.

There are errors in the configuration of this machine. Please fix
the following errors and try again:

Vagrant:
* Unknown configuration section 'trigger'.


~/w/Vagrantfiles ❯❯❯