Following on from #23335 I applied the patch from http://projects.theforeman.org/issues/23335#note-31

I now get this error when I attempt to create a new VM:

2018-04-24 04:29:02 e0e9f15a [app] [W] Failed to create a compute prod03.ashb (VMware) instance irvin-catania.example.com: InvalidRequest:
 | Cannot parse "70aa0880-4799-11e8-b3ab-d7400f90b035" as an int value
 |
 | while parsing serialized value of type int
 | at line 1, column 1394
 |
 | while parsing property "key" of static type int
 |
 | while parsing serialized DataObject of type vim.vm.device.VirtualDisk
 | at line 1, column 1363
 |
 | while parsing property "device" of static type VirtualDevice
 |
 | while parsing serialized DataObject of type vim.vm.device.VirtualDeviceSpec
 | at line 1, column 1251
 |
 | while parsing property "deviceChange" of static type ArrayOfVirtualDeviceConfigSpec
 |
 | while parsing serialized DataObject of type vim.vm.ConfigSpec
 | at line 1, column 247
 |
 | while parsing call information for method CreateVM_Task
 | at line 1, column 177
 |
 | while parsing SOAP body
 | at line 1, column 167
 |
 | while parsing SOAP envelope
 | at line 1, column 0
 |
 | while parsing HTTP request for method createVm
 | on object of type vim.Folder
 | at line 1, column 0
 |
 | RbVmomi::Fault: InvalidRequest:
 | Cannot parse "70aa0880-4799-11e8-b3ab-d7400f90b035" as an int value
 |
 | while parsing serialized value of type int
 | at line 1, column 1394
 |
 | while parsing property "key" of static type int
 |
 | while parsing serialized DataObject of type vim.vm.device.VirtualDisk
 | at line 1, column 1363
 |
 | while parsing property "device" of static type VirtualDevice
 |
 | while parsing serialized DataObject of type vim.vm.device.VirtualDeviceSpec
 | at line 1, column 1251
 |
 | while parsing property "deviceChange" of static type ArrayOfVirtualDeviceConfigSpec
 |
 | while parsing serialized DataObject of type vim.vm.ConfigSpec
 | at line 1, column 247
 |
 | while parsing call information for method CreateVM_Task
 | at line 1, column 177
 |
 | while parsing SOAP body
 | at line 1, column 167
 |
 | while parsing SOAP envelope
 | at line 1, column 0
 |
 | while parsing HTTP request for method createVm
 | on object of type vim.Folder
 | at line 1, column 0
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbvmomi-1.10.0/lib/rbvmomi/connection.rb:63:in `parse_response'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbvmomi-1.10.0/lib/rbvmomi/connection.rb:92:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbvmomi-1.10.0/lib/rbvmomi/basic_types.rb:213:in `_call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbvmomi-1.10.0/lib/rbvmomi/basic_types.rb:76:in `block (2 levels) in init'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-2.1.0/lib/fog/vsphere/requests/compute/create_vm.rb:48:in `create_vm_on_datastore'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-2.1.0/lib/fog/vsphere/requests/compute/create_vm.rb:40:in `create_vm'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/fog-vsphere-2.1.0/lib/fog/vsphere/models/compute/server.rb:303:in `save'
 | /usr/share/foreman/app/models/compute_resources/foreman/model/vmware.rb:447:in `create_vm'
 | /usr/share/foreman/app/models/concerns/orchestration/compute.rb:77:in `setCompute'
 | /usr/share/foreman/app/models/concerns/orchestration.rb:222:in `execute'
 | /usr/share/foreman/app/models/concerns/orchestration.rb:145:in `block in process'
 | /usr/share/foreman/app/models/concerns/orchestration.rb:137:in `each'
 | /usr/share/foreman/app/models/concerns/orchestration.rb:137:in `process'
 | /usr/share/foreman/app/models/concerns/orchestration.rb:44:in `around_save_orchestration'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:117:in `block in run_callbacks'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:135:in `run_callbacks'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:827:in `_run_save_callbacks'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/callbacks.rb:336:in `create_or_update'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/persistence.rb:129:in `save'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/validations.rb:44:in `save'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/attribute_methods/dirty.rb:35:in `save'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:308:in `block (2 levels) in save'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:384:in `block in with_transaction_returning_status'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/database_statements.rb:235:in `block in transaction'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/transaction.rb:194:in `block in within_new_transaction'
 | /opt/rh/rh-ruby24/root/usr/share/ruby/monitor.rb:214:in `mon_synchronize'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/transaction.rb:191:in `within_new_transaction'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/connection_adapters/abstract/database_statements.rb:235:in `transaction'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:210:in `transaction'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:381:in `with_transaction_returning_status'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:308:in `block in save'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:323:in `rollback_active_record_state!'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/transactions.rb:307:in `save'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/suppressor.rb:42:in `save'
 | /usr/share/foreman/app/models/concerns/foreman/sti.rb:26:in `save'
 | /usr/share/foreman/app/controllers/hosts_controller.rb:104:in `create'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/abstract_controller/base.rb:186:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal/rendering.rb:30:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:108:in `block in run_callbacks'
 | /usr/share/foreman/app/controllers/concerns/application_shared.rb:15:in `set_timezone'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:117:in `block in run_callbacks'
 | /usr/share/foreman/app/models/concerns/foreman/thread_session.rb:32:in `clear_thread'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:117:in `block in run_callbacks'
 | /usr/share/foreman/app/controllers/concerns/foreman/controller/topbar_sweeper.rb:12:in `set_topbar_sweeper_controller'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:117:in `block in run_callbacks'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/audited-4.4.1/lib/audited/sweeper.rb:14:in `around'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:117:in `block in run_callbacks'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/audited-4.4.1/lib/audited/sweeper.rb:14:in `around'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:117:in `block in run_callbacks'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:135:in `run_callbacks'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/abstract_controller/callbacks.rb:19:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal/rescue.rb:20:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/notifications.rb:166:in `block in instrument'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/notifications.rb:166:in `instrument'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal/params_wrapper.rb:252:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activerecord-5.1.4/lib/active_record/railties/controller_runtime.rb:22:in `process_action'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/abstract_controller/base.rb:124:in `process'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionview-5.1.4/lib/action_view/rendering.rb:30:in `process'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal.rb:189:in `dispatch'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_controller/metal.rb:253:in `dispatch'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:49:in `dispatch'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:31:in `serve'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:50:in `block in serve'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33:in `each'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33:in `serve'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:834:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.6/lib/apipie/static_dispatcher.rb:65:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.6/lib/apipie/extractor/recorder.rb:136:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.5.6/lib/apipie/middleware/checksum_in_headers.rb:27:in `call'
 | /usr/share/foreman/lib/middleware/catch_json_parse_errors.rb:8:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/etag.rb:25:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/conditional_get.rb:38:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/head.rb:12:in `call'
 | /usr/share/foreman/lib/middleware/session_safe_logging.rb:17:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/session/abstract/id.rb:232:in `context'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/session/abstract/id.rb:226:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/cookies.rb:613:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/callbacks.rb:26:in `block in call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:97:in `run_callbacks'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/callbacks.rb:24:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/railties-5.1.4/lib/rails/rack/logger.rb:36:in `call_app'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/railties-5.1.4/lib/rails/rack/logger.rb:26:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/sprockets-rails-3.2.1/lib/sprockets/rails/quiet_assets.rb:13:in `call'
 | /usr/share/foreman/lib/middleware/tagged_logging.rb:18:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/request_id.rb:25:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/method_override.rb:22:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/runtime.rb:22:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/executor.rb:12:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/actionpack-5.1.4/lib/action_dispatch/middleware/static.rb:125:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/sendfile.rb:111:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/secure_headers-3.4.1/lib/secure_headers/middleware.rb:12:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/railties-5.1.4/lib/rails/engine.rb:522:in `call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/railties-5.1.4/lib/rails/railtie.rb:185:in `public_send'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/railties-5.1.4/lib/rails/railtie.rb:185:in `method_missing'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/urlmap.rb:68:in `block in call'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/urlmap.rb:53:in `each'
 | /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/rack-2.0.3/lib/rack/urlmap.rb:53:in `call'
 | /usr/share/passenger/phusion_passenger/rack/thread_handler_extension.rb:74:in `process_request'
 | /usr/share/passenger/phusion_passenger/request_handler/thread_handler.rb:141:in `accept_and_process_next_request'
 | /usr/share/passenger/phusion_passenger/request_handler/thread_handler.rb:109:in `main_loop'
 | /usr/share/passenger/phusion_passenger/request_handler.rb:455:in `block (3 levels) in start_threads'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `block in create_with_logging_context'
2018-04-24 04:29:02 e0e9f15a [app] [W] Rolling back due to a problem: [#<Orchestration::Task:0x000000095134f8 @name="Set up compute instance irvin-catania.example.com", @status="failed", @priority=2, @action=[#<Host::Managed id: nil, name: "irvin-catania.example.com", last_compile: nil, last_report: nil, updated_at: nil, created_at: nil, root_pass: "$xxxx, architecture_id: 1, operatingsystem_id: 1, environment_id: 1, ptable_id: 88, medium_id: 1, build: true, comment: "", disk: "", installed_at: nil, model_id: nil, hostgroup_id: nil, owner_id: 6, owner_type: "User", enabled: true, puppet_ca_proxy_id: 1, managed: true, use_image: nil, image_file: nil, uuid: nil, compute_resource_id: 2, puppet_proxy_id: 1, certname: nil, image_id: nil, organization_id: nil, location_id: nil, type: "Host::Managed", otp: nil, realm_id: 1, compute_profile_id: nil, provision_method: "build", grub_pass: "$xxxxx", global_status: 0, lookup_value_matcher: "fqdn=irvin-catania.example.com", pxe_loader: "PXELinux BIOS">, :setCompute], @timestamp=2018-04-24 08:29:02 UTC>]