ISE: Unable to find Plan for <build>

2014-02-19 03:22:40,116 INFO [http-bio-8085-exec-508] [AccessLogFilter] <user> GET https://extranet-bamboo.internal.atlassian.com/chain/result/viewChainResult.action?planKey=PEI-CTHUL&buildNumber=6 702588kb

2014-02-19 03:22:40,133 ERROR [http-bio-8085-exec-508] [FiveOhOh] 500 Exception was thrown.
com.atlassian.util.concurrent.LazyReference$InitializationException: java.lang.IllegalStateException: Unable to find Plan for PEI-CTHUL-JON-6
        at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:149)
        at com.atlassian.util.concurrent.LazyReference.get(LazyReference.java:112)
        at com.atlassian.util.concurrent.ResettableLazyReference.get(ResettableLazyReference.java:87)
...
Caused by: java.lang.IllegalStateException: Unable to find Plan for PEI-CTHUL-JON-6
        at com.atlassian.bamboo.resultsummary.AbstractResultsSummary$1.create(AbstractResultsSummary.java:123)
        at com.atlassian.bamboo.resultsummary.AbstractResultsSummary$1.create(AbstractResultsSummary.java:111)
        at com.atlassian.util.concurrent.ResettableLazyReference$InternalReference.create(ResettableLazyReference.java:140)
        at com.atlassian.util.concurrent.LazyReference$Sync.run(LazyReference.java:321)
        at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:143)
        ... 198 more