Upgrade to 1.14.0 on NC 24.0.6 yields BadFunctionCallException: authMethod is not a valid attribute

Steps to reproduce

1. Begin with an instance of NC 24.0.6 and Mail 1.13.9 installed
2. Configure and test mail account to local IMAP server using mail app per user (as opposed to the global Groupware settings)
3. Upgrade to Mail 1.14.0

Expected behavior

Mail should upgrade and continue to be functional via the web UI.

Actual behavior

Upon login to previously working user account the dashboard mail widget just spins and never shows any content. Attempting to click into the Mail app yields:

Internal Server Error
The server was unable to complete your request.

If this happens again, please send the technical details below to the server administrator.

More details can be found in the server log.

Technical details
Remote Address: <Removed for privacy>
Request ID: <Removed for privacy>

Mail app version

1.14.0

Mailserver or service

Local Dovecot IMAP/Postfix SMTP

Operating system

Ubuntu Server 20.04.5 LTS

PHP engine version

PHP 7.4

Web server

Apache (supported)

Database

MySQL

Additional info

[index] Error: BadFunctionCallException: authMethod is not a valid attribute at <<closure>>

 0. /srv/www/nextcloud/lib/public/AppFramework/Db/Entity.php line 165
    OCP\AppFramework\Db\Entity->setter()
 1. /srv/www/nextcloud/lib/public/AppFramework/Db/Entity.php line 73
    OCP\AppFramework\Db\Entity->__call()
 2. /srv/www/nextcloud/lib/public/AppFramework/Db/QBMapper.php line 322
    OCP\AppFramework\Db\Entity::fromRow()
 3. /srv/www/nextcloud/lib/public/AppFramework/Db/QBMapper.php line 341
    OCP\AppFramework\Db\QBMapper->mapRowToEntity()
 4. /srv/www/nextcloud/apps/mail/lib/Db/MailAccountMapper.php line 98
    OCP\AppFramework\Db\QBMapper->findEntities()
 5. /srv/www/nextcloud/apps/mail/lib/Service/AccountService.php line 72
    OCA\Mail\Db\MailAccountMapper->findByUserId()
 6. /srv/www/nextcloud/apps/mail/lib/Controller/PageController.php line 129
    OCA\Mail\Service\AccountService->findByUserId()
 7. /srv/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 225
    OCA\Mail\Controller\PageController->index()
 8. /srv/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 133
    OC\AppFramework\Http\Dispatcher->executeController()
 9. /srv/www/nextcloud/lib/private/AppFramework/App.php line 172
    OC\AppFramework\Http\Dispatcher->dispatch()
10. /srv/www/nextcloud/lib/private/Route/Router.php line 298
    OC\AppFramework\App::main()
11. /srv/www/nextcloud/lib/base.php line 1030
    OC\Route\Router->match()
12. /srv/www/nextcloud/index.php line 36
    OC::handleRequest()

GET /apps/mail/
from <Removed IP> by <Removed user> at 2022-10-11T09:07:19+00:00

Start at apps/mail/lib/Db/MailAccountMapper.php line 98 and trace how stored account rows are mapped through AccountService.php. Reproduce the upgrade from Mail 1.13.9 to 1.14.0 with a per-user IMAP account, then verify that the Mail app and dashboard widget load without the authMethod exception.