Caught exception in MusicBrainz::Server::Controller::ReleaseEditor::Edit->edit "Can't use an undefined value as a HASH reference at lib/MusicBrainz/Server/Wizard.pm line 269."

Stack trace:

line 269 MusicBrainz::Server::Wizard
line 772 MusicBrainz::Server::Wizard::ReleaseEditor
line 75 MusicBrainz::Server::Wizard::ReleaseEditor
line 169 MusicBrainz::Server::Wizard
line 402 MusicBrainz::Server::Wizard
line 133 MusicBrainz::Server::Wizard
line 92 MusicBrainz::Server::Wizard::ReleaseEditor
line 17 MusicBrainz::Server::Controller::ReleaseEditor::Edit
line 316 MusicBrainz::Server
line 316 MusicBrainz::Server
line 316 MusicBrainz::Server
line 280 MusicBrainz::Server

Request data:
$VAR1 = {
'query_parameters' => {},
'body_parameters' => {
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'rec_mediums.2.associations.0.confirmed' => '1',
'rec_mediums.1.associations.12.confirmed' => '1',
'next' => "Next \x

",
'select-recording-2-15' => 'on',
'select-recording-0-2' => 'on',
'rec_mediums.2.associations.17.edit_sha1' => 'O1/ynG+waxXCBG292AD/qgLrVfM',
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'rec_mediums.1.associations.6.edit_sha1' => 'mAhGKfL8Bo4fX4cRBezUvkfEbOY'
}
};

URL:http://musicbrainz.org/release/693010fb-a570-4262-a6cf-f7e291f1595d/edit