connecting with an invalid token results in a SQL exception

[individual-it]

1. connect with the desktop app via oauth
2. delete the authorized application in Settings=>Security
3. resync with the desktop app

everything works fine for the user but there is an SQL exception loged

{"reqId":"2df63cea-2281-4531-a3b2-d1bcc62f08fb","level":3,"time":"2018-04-13T10:55:58+00:00","remoteAddr":"127.0.0.1","user":"--","app":"OCA\\OAuth2\\Controller\\OAuthApiController","method":"POST","url":"\/owncloud-10.0.8RC\/owncloud\/index.php\/apps\/oauth2\/api\/v1\/token","message":"Exception: {\"Exception\":\"OCP\\\\AppFramework\\\\Db\\\\DoesNotExistException\",\"Message\":\"Did expect one result but found none when executing: query \\\"SELECT * FROM `*PREFIX*oauth2_refresh_tokens` WHERE `token` = ?\\\"; parameters Array\\n(\\n    [0] => aTvtNSoJNjJMIvHIk2834akjm9FvIfLAp4APzZIXwzkinSLd88iDxQiGpPbWTdSk\\n)\\n; limit \\\"\\\"; offset \\\"\\\"\",\"Code\":0,\"Trace\":\"#0 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/public\\\/AppFramework\\\/Db\\\/Mapper.php(379): OCP\\\\AppFramework\\\\Db\\\\Mapper->findOneQuery('SELECT * FROM `...', Array, NULL, NULL)\\n#1 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/apps\\\/oauth2\\\/lib\\\/Db\\\/RefreshTokenMapper.php(75): OCP\\\\AppFramework\\\\Db\\\\Mapper->findEntity('SELECT * FROM `...', Array, NULL, NULL)\\n#2 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/apps\\\/oauth2\\\/lib\\\/Controller\\\/OAuthApiController.php(165): OCA\\\\OAuth2\\\\Db\\\\RefreshTokenMapper->findByToken('aTvtNSoJNjJMIvH...')\\n#3 [internal function]: OCA\\\\OAuth2\\\\Controller\\\\OAuthApiController->generateToken(*** sensitive parameters replaced ***)\\n#4 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/private\\\/AppFramework\\\/Http\\\/Dispatcher.php(159): call_user_func_array(Array, Array)\\n#5 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/private\\\/AppFramework\\\/Http\\\/Dispatcher.php(89): OC\\\\AppFramework\\\\Http\\\\Dispatcher->executeController(Object(OCA\\\\OAuth2\\\\Controller\\\\OAuthApiController), 'generateToken')\\n#6 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/private\\\/AppFramework\\\/App.php(103): OC\\\\AppFramework\\\\Http\\\\Dispatcher->dispatch(Object(OCA\\\\OAuth2\\\\Controller\\\\OAuthApiController), 'generateToken')\\n#7 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/private\\\/AppFramework\\\/Routing\\\/RouteActionHandler.php(46): OC\\\\AppFramework\\\\App::main('OCA\\\\\\\\OAuth2\\\\\\\\Cont...', 'generateToken', Object(OC\\\\AppFramework\\\\DependencyInjection\\\\DIContainer), Array)\\n#8 [internal function]: OC\\\\AppFramework\\\\Routing\\\\RouteActionHandler->__invoke(Array)\\n#9 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/private\\\/Route\\\/Router.php(342): call_user_func(Object(OC\\\\AppFramework\\\\Routing\\\\RouteActionHandler), Array)\\n#10 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/base.php(912): OC\\\\Route\\\\Router->match('\\\/apps\\\/oauth2\\\/ap...')\\n#11 \\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/index.php(55): OC::handleRequest()\\n#12 {main}\",\"File\":\"\\\/home\\\/artur\\\/www\\\/owncloud-10.0.8RC\\\/owncloud\\\/lib\\\/public\\\/AppFramework\\\/Db\\\/Mapper.php\",\"Line\":294}"}