I received the following error when trying to add a new release to an existing artist:

Oops, something went wrong!

Error:

Caught exception in MusicBrainz::Server::Controller::ReleaseEditor::Add->add "Attribute (params) does not pass the type constraint because: Validation failed for 'HashRef' with value undef at accessor HTML::FormHandler::params (defined at local/lib/perl5/HTML/FormHandler.pm line 182) line 4
HTML::FormHandler::params('MusicBrainz::Server::Form::ReleaseEditor::Duplicates=HASH(0xe...', undef) called at local/lib/perl5/HTML/FormHandler.pm line 388
HTML::FormHandler::setup_form('MusicBrainz::Server::Form::ReleaseEditor::Duplicates=HASH(0xe...', 'params', undef) called at local/lib/perl5/HTML/FormHandler.pm line 283
HTML::FormHandler::process('MusicBrainz::Server::Form::ReleaseEditor::Duplicates=HASH(0xe...', 'params', undef) called at lib/MusicBrainz/Server/Form.pm line 109
MusicBrainz::Server::Form::unserialize('MusicBrainz::Server::Form::ReleaseEditor::Duplicates=HASH(0xe...', 'HASH(0xe1e4e20)') called at lib/MusicBrainz/Server/Wizard.pm line 528
MusicBrainz::Server::Wizard::_load_form('MusicBrainz::Server::Wizard::ReleaseEditor::Add=HASH(0xcd7c998)', 1, 'serialized', 'HASH(0xe1e4e20)') called at lib/MusicBrainz/Server/Wizard.pm line 238
MusicBrainz::Server::Wizard::_load_page('MusicBrainz::Server::Wizard::ReleaseEditor::Add=HASH(0xcd7c998)', 1) called at lib/MusicBrainz/Server/Wizard.pm line 172
MusicBrainz::Server::Wizard::navigate_to_page('MusicBrainz::Server::Wizard::ReleaseEditor::Add=HASH(0xcd7c998)') called at lib/MusicBrainz/Server/Wizard.pm line 401
MusicBrainz::Server::Wizard::_route('MusicBrainz::Server::Wizard::ReleaseEditor::Add=HASH(0xcd7c998)', 'MusicBrainz::Server::Form::ReleaseEditor::Information=HASH(0x...') called at lib/MusicBrainz/Server/Wizard.pm line 132
MusicBrainz::Server::Wizard::process('MusicBrainz::Server::Wizard::ReleaseEditor::Add=HASH(0xcd7c998)') called at lib/MusicBrainz/Server/Wizard/ReleaseEditor.pm line 92
MusicBrainz::Server::Wizard::ReleaseEditor::run('MusicBrainz::Server::Wizard::ReleaseEditor::Add=HASH(0xcd7c998)') called at lib/MusicBrainz/Server/Controller/ReleaseEditor/Add.pm line 23
MusicBrainz::Server::Controller::ReleaseEditor::Add::add('MusicBrainz::Server::Controller::ReleaseEditor::Add=HASH(0xbe...', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst/Action.pm line 65
Catalyst::Action::execute('Catalyst::Action=HASH(0xc208eb0)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add=HASH(0xbe...', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst.pm line 1667
eval

{...} called at local/lib/perl5/Catalyst.pm line 1667
Catalyst::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc208eb0)') called at local/lib/perl5/Catalyst/Plugin/StackTrace.pm line 94
Catalyst::Plugin::StackTrace::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc208eb0)') called at lib/MusicBrainz/Server.pm line 306
MusicBrainz::Server::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc208eb0)') called at local/lib/perl5/Catalyst/Action.pm line 60
Catalyst::Action::dispatch('Catalyst::Action=HASH(0xc208eb0)', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst/Controller.pm line 125
Catalyst::Controller::_ACTION('MusicBrainz::Server::Controller::ReleaseEditor::Add=HASH(0xbe...', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst/Action.pm line 65
Catalyst::Action::execute('Catalyst::Action=HASH(0xc0be128)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add=HASH(0xbe...', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst.pm line 1667
eval {...}

called at local/lib/perl5/Catalyst.pm line 1667
Catalyst::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc0be128)') called at local/lib/perl5/Catalyst/Plugin/StackTrace.pm line 94
Catalyst::Plugin::StackTrace::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc0be128)') called at lib/MusicBrainz/Server.pm line 306
MusicBrainz::Server::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc0be128)') called at local/lib/perl5/Catalyst/Action.pm line 60
Catalyst::Action::dispatch('Catalyst::Action=HASH(0xc0be128)', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst/Dispatcher.pm line 257
Catalyst::Dispatcher::_do_forward('Catalyst::Dispatcher=HASH(0x4417270)', 'forward', 'MusicBrainz::Server=HASH(0xc659138)', '_ACTION') called at local/lib/perl5/Catalyst/Dispatcher.pm line 237
Catalyst::Dispatcher::forward('Catalyst::Dispatcher=HASH(0x4417270)', 'MusicBrainz::Server=HASH(0xc659138)', '_ACTION') called at local/lib/perl5/Catalyst.pm line 342
Catalyst::forward('MusicBrainz::Server=HASH(0xc659138)', '_ACTION') called at local/lib/perl5/Catalyst/Controller.pm line 99
Catalyst::Controller::_DISPATCH('MusicBrainz::Server::Controller::ReleaseEditor::Add=HASH(0xbe...', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst/Action.pm line 65
Catalyst::Action::execute('Catalyst::Action=HASH(0xc21a268)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add=HASH(0xbe...', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst.pm line 1667
eval

{...} called at local/lib/perl5/Catalyst.pm line 1667
Catalyst::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc21a268)') called at local/lib/perl5/Catalyst/Plugin/StackTrace.pm line 94
Catalyst::Plugin::StackTrace::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc21a268)') called at lib/MusicBrainz/Server.pm line 306
MusicBrainz::Server::execute('MusicBrainz::Server=HASH(0xc659138)', 'MusicBrainz::Server::Controller::ReleaseEditor::Add', 'Catalyst::Action=HASH(0xc21a268)') called at local/lib/perl5/Catalyst/Action.pm line 60
Catalyst::Action::dispatch('Catalyst::Action=HASH(0xc21a268)', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst/Dispatcher.pm line 257
Catalyst::Dispatcher::_do_forward('Catalyst::Dispatcher=HASH(0x4417270)', 'forward', 'MusicBrainz::Server=HASH(0xc659138)', '/release_editor/_DISPATCH') called at local/lib/perl5/Catalyst/Dispatcher.pm line 237
Catalyst::Dispatcher::forward('Catalyst::Dispatcher=HASH(0x4417270)', 'MusicBrainz::Server=HASH(0xc659138)', '/release_editor/_DISPATCH') called at local/lib/perl5/Catalyst.pm line 342
Catalyst::forward('MusicBrainz::Server=HASH(0xc659138)', '/release_editor/_DISPATCH') called at local/lib/perl5/Catalyst/Dispatcher.pm line 105
Catalyst::Dispatcher::dispatch('Catalyst::Dispatcher=HASH(0x4417270)', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst.pm line 1613
Catalyst::dispatch('MusicBrainz::Server=HASH(0xc659138)') called at lib/MusicBrainz/Server.pm line 270
Class::MOP::Class:::around('CODE(0x3c76498)', 'MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/x86_64-linux-gnu-thread-multi/Class/MOP/Method/Wrapped.pm line 162
Class::MOP::Method::Wrapped::_ANON_('MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/x86_64-linux-gnu-thread-multi/Class/MOP/Method/Wrapped.pm line 91
MusicBrainz::Server::dispatch('MusicBrainz::Server=HASH(0xc659138)') called at local/lib/perl5/Catalyst.pm line 1963
Catalyst::_ANON_() called at local/lib/perl5/Try/Tiny.pm line 76
eval {...}

called at local/lib/perl5/Try/Tiny.pm line 67
Try::Tiny::try('CODE(0xc485568)', 'Try::Tiny::Catch=REF(0xcb7cc90)') called at local/lib/perl5/Catalyst.pm line 1969
Catalyst::handle_request('MusicBrainz::Server', 'env', 'HASH(0xca3d0c0)') called at lib/Catalyst/Plugin/AutoRestart.pm line 119
Catalyst::Plugin::AutoRestart::handle_request('MusicBrainz::Server', 'env', 'HASH(0xca3d0c0)') called at local/lib/perl5/Catalyst/Engine.pm line 856
Catalyst::Engine::_ANON_('CODE(0xcaa16b0)') called at local/lib/perl5/Plack/Handler/FCGI.pm line 134
Plack::Handler::FCGI::run('Plack::Handler::FCGI=HASH(0x2114a30)', 'CODE(0xc4165c8)') called at local/lib/perl5/Plack/Loader.pm line 88
Plack::Loader::run('Plack::Loader=HASH(0x20dde00)', 'Plack::Handler::FCGI=HASH(0x2114a30)') called at local/lib/perl5/Plack/Runner.pm line 263
Plack::Runner::run('Plack::Runner=HASH(0x1ee0808)') called at local/bin/plackup line 10"

Stack trace:

line 109 MusicBrainz::Server::Form
line 528 MusicBrainz::Server::Wizard
line 238 MusicBrainz::Server::Wizard
line 172 MusicBrainz::Server::Wizard
line 401 MusicBrainz::Server::Wizard
line 132 MusicBrainz::Server::Wizard
line 92 MusicBrainz::Server::Wizard::ReleaseEditor
line 23 MusicBrainz::Server::Controller::ReleaseEditor::Add
line 306 MusicBrainz::Server
line 306 MusicBrainz::Server
line 306 MusicBrainz::Server
line 270 MusicBrainz::Server

Request data:

$VAR1 = {
'query_parameters' =>

{ 'artist' => 'b337f083-3224-4e1b-838b-65a0a13ef2d4' }

,
'body_parameters' => {
'artist_credit.names.0.name' => 'Kathryn Scott',
'packaging_id' => '',
'next' => "Next \x

{bb}

",
'date.month' => '08',
'release_group_id' => '',
'labels.0.catalog_number' => '',
'wizard_page_id' => '0',
'release_group.name' => '',
'artist_credit.names.0.artist.id' => '104898',
'labels.0.deleted' => '0',
'country_id' => '222',
'primary_type_id' => '1',
'labels.0.name' => '',
'date.year' => '2010',
'id' => '',
'script_id' => '28',
'status_id' => '1',
'date.day' => '10',
'name' => 'We Still Believe',
'barcode' => '',
'artist_credit.names.0.join_phrase' => '',
'labels.0.label_id' => '',
'wizard_session_id' => '0.463409510577858',
'language_id' => '120',
'comment' => '',
'gc-mode' => 'English',
'artist_credit.names.0.artist.name' => 'Kathryn Scott',
'annotation' => ''
}
};

URL: http://musicbrainz.org/release/add?artist=b337f083-3224-4e1b-838b-65a0a13ef2d4