Instance schedules fails to start Ubuntu Stock Image

2015-05-29 18:45:00,033 INFO [scheduler_Worker-1] [ElasticFunctionalityFacadeImpl] Adjusting elastic agents with schedule: com.atlassian.bamboo.agent.elastic.schedule.ElasticInstanceScheduleImpl@3f36a682[25296897,0 0/15 18-20 ? * *,com.atlassian.bamboo.agent.elastic.server.ElasticImageConfigurationImpl@5b50e640,EQUALS,1,true]
2015-05-29 18:45:00,033 INFO [scheduler_Worker-1] [ElasticFunctionalityFacadeImpl] Starting up 1 of 'Ubuntu stock image' elastic instances
2015-05-29 18:45:04,911 INFO [http-bio-10581-exec-16] [AccessLogFilter] admin GET http://localhost:10581/bamboo581/ajax/viewPlanUpdates.action?sinceSystemTime=1432896283920&lastProject= 65053kb
2015-05-29 18:45:06,370 INFO [scheduler_Worker-1] [ElasticFunctionalityFacadeImpl] Requested that new elastic instance be created for configuration: Ubuntu stock image / ami-8946a989
2015-05-29 18:45:06,376 INFO [elastic-pool-4-thread-1] [RemoteElasticInstanceEbsHelperImpl] Running non-BDM EBS handling code
2015-05-29 18:45:06,704 ERROR [elastic-pool-4-thread-1] [RemoteEC2InstanceImpl] EC2 instance order failed.
com.amazonaws.AmazonServiceException: The image id '[ami-8946a989]' does not exist (Service: AmazonEC2; Status Code: 400; Error Code: InvalidAMIID.NotFound; Request ID: 5739d640-fce7-4adc-ae08-e2cb40360778)
        at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1077)
        at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:725)
        at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:460)
        at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:295)
        at com.amazonaws.services.ec2.AmazonEC2Client.invoke(AmazonEC2Client.java:9823)
        at com.amazonaws.services.ec2.AmazonEC2Client.describeImages(AmazonEC2Client.java:4911)
        at com.atlassian.aws.ec2.caches.ImageCache.describeImages(ImageCache.java:43)
        at com.atlassian.aws.AWSAccountImpl.describeImages(AWSAccountImpl.java:645)
        at com.atlassian.aws.AWSAccountImpl.describeImage(AWSAccountImpl.java:639)
        at com.atlassian.aws.ec2.InstanceLauncherFactory.getBlockDeviceMappings(InstanceLauncherFactory.java:294)
        at com.atlassian.aws.ec2.InstanceLauncherFactory.access$300(InstanceLauncherFactory.java:41)
        at com.atlassian.aws.ec2.InstanceLauncherFactory$AwsInstanceLauncher.getRunInstancesRequest(InstanceLauncherFactory.java:139)
        at com.atlassian.aws.ec2.InstanceLauncherFactory$AwsInstanceLauncher.runInstance(InstanceLauncherFactory.java:114)
        at com.atlassian.aws.ec2.InstanceLauncherFactory$AwsInstanceLauncher.call(InstanceLauncherFactory.java:101)
        at com.atlassian.aws.ec2.RemoteEC2InstanceImpl.launchInstance(RemoteEC2InstanceImpl.java:462)
        at com.atlassian.aws.ec2.RemoteEC2InstanceImpl.backgroundStart(RemoteEC2InstanceImpl.java:445)
        at com.atlassian.aws.ec2.RemoteEC2InstanceImpl.access$200(RemoteEC2InstanceImpl.java:39)
        at com.atlassian.aws.ec2.RemoteEC2InstanceImpl$1.run(RemoteEC2InstanceImpl.java:104)
        at com.atlassian.aws.ec2.RemoteEC2InstanceImpl$CatchingRunnableDecorator.run(RemoteEC2InstanceImpl.java:84)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)