NullPointer in DefaultAssociationManager

After importing our data from an EAP 5 installation to RC3 I get this error at the console:

15:17:48,619 ERROR [STDERR] java.lang.NullPointerException
15:17:48,619 ERROR [STDERR] at com.atlassian.core.association.DefaultAssocia
tionManager.getSinkFromSource(DefaultAssociationManager.java:200)
15:17:48,619 ERROR [STDERR] at com.atlassian.core.association.DefaultAssocia
tionManager.getSinkFromSource(DefaultAssociationManager.java:192)
15:17:48,619 ERROR [STDERR] at com.atlassian.jira.notification.NotificationS
chemeManager.getSchemes(NotificationSchemeManager.java:53)
15:17:48,619 ERROR [STDERR] at com.atlassian.jira.notification.NotificationS
chemeManager.getRecipients(NotificationSchemeManager.java:132)
15:17:48,629 ERROR [STDERR] at com.atlassian.jira.mail.IssueMailQueueItem.se
nd(IssueMailQueueItem.java:86)
15:17:48,629 ERROR [STDERR] at com.atlassian.jira.mail.MailQueue.sendBuffer(
MailQueue.java:60)
15:17:48,629 ERROR [STDERR] at com.atlassian.jira.service.services.mail.Mail
QueueService.run(MailQueueService.java:24)
15:17:48,629 ERROR [STDERR] at com.atlassian.jira.service.JiraServiceContain
er.run(JiraServiceContainer.java:53)
15:17:48,629 ERROR [STDERR] at com.atlassian.jira.service.ServiceRunner.exec
ute(ServiceRunner.java:54)
15:17:48,629 ERROR [STDERR] at org.quartz.core.JobRunShell.run(JobRunShell.j
ava:160)
15:17:48,629 ERROR [STDERR] at org.quartz.simpl.SimpleThreadPool$WorkerThrea
d.run(SimpleThreadPool.java:268)
15:17:48,629 ERROR [IssueMailQueueItem]
java.lang.NullPointerException
at com.atlassian.core.association.DefaultAssociationManager.getSinkFromS
ource(DefaultAssociationManager.java:200)
at com.atlassian.core.association.DefaultAssociationManager.getSinkFromS
ource(DefaultAssociationManager.java:192)
at com.atlassian.jira.notification.NotificationSchemeManager.getSchemes(
NotificationSchemeManager.java:53)
at com.atlassian.jira.notification.NotificationSchemeManager.getRecipien
ts(NotificationSchemeManager.java:132)
at com.atlassian.jira.mail.IssueMailQueueItem.send(IssueMailQueueItem.ja
va:86)
at com.atlassian.jira.mail.MailQueue.sendBuffer(MailQueue.java:60)
at com.atlassian.jira.service.services.mail.MailQueueService.run(MailQue
ueService.java:24)
at com.atlassian.jira.service.JiraServiceContainer.run(JiraServiceContai
ner.java:53)
at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:5
4)
at org.quartz.core.JobRunShell.run(JobRunShell.java:160)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.j
ava:268)
15:17:48,629 INFO [ServiceRunner] Finished Running Service [Mail Queue Service,
com.atlassian.jira.service.JiraServiceContainer,60000]