ConsumerException when scanning database

I'm running the 1.0.2 branch, version 632005. I got a bunch of similar consumerexceptions when i tried to scan the database. however, i only got them the first time (after upgrading from a previous version of the code on the 1.0.2 branch), now scans seem to be proceeding without problem. an example exception is included below.

org.apache.maven.archiva.consumers.ConsumerException: Unable to find Database Object [org.apache.maven:maven-profile:2.0.7] of type org.apache.maven.archiva.model.ArchivaProjectModel using no fetch-group
at org.apache.maven.archiva.consumers.database.DatabaseCleanupRemoveProjectConsumer.processArchivaArtifact(DatabaseCleanupRemoveProjectConsumer.java:119)
at org.apache.maven.archiva.database.updater.ProcessArchivaArtifactClosure.execute(ProcessArchivaArtifactClosure.java:52)
at org.apache.commons.collections.CollectionUtils.forAllDo(CollectionUtils.java:388)
at org.apache.maven.archiva.database.updater.JdoDatabaseUpdater.updateProcessed(JdoDatabaseUpdater.java:172)
at org.apache.maven.archiva.database.updater.JdoDatabaseUpdater.updateAllProcessed(JdoDatabaseUpdater.java:113)
at org.apache.maven.archiva.scheduled.executors.ArchivaDatabaseUpdateTaskExecutor.executeTask(ArchivaDatabaseUpdateTaskExecutor.java:78)
at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ThreadedTaskQueueExecutor.java:116)
at edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:176)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690)
at java.lang.Thread.run(Thread.java:595)