Restarting CE project analysis task after restart of SQ fails with SQL error

java.lang.IllegalStateException: Fail to insert scanner context for task AVfXSZmBw72xhIYRytsz
	at org.sonar.db.ce.CeScannerContextDao.insert(CeScannerContextDao.java:67)
	at org.sonar.server.computation.task.projectanalysis.step.PersistScannerContextStep.execute(PersistScannerContextStep.java:50)
	at org.sonar.server.computation.task.step.ComputationStepExecutor.executeSteps(ComputationStepExecutor.java:64)
	at org.sonar.server.computation.task.step.ComputationStepExecutor.execute(ComputationStepExecutor.java:52)
	at org.sonar.server.computation.task.projectanalysis.taskprocessor.ReportTaskProcessor.process(ReportTaskProcessor.java:75)
	at org.sonar.server.computation.taskprocessor.CeWorkerCallableImpl.executeTask(CeWorkerCallableImpl.java:84)
	at org.sonar.server.computation.taskprocessor.CeWorkerCallableImpl.call(CeWorkerCallableImpl.java:57)
	at org.sonar.server.computation.taskprocessor.CeWorkerCallableImpl.call(CeWorkerCallableImpl.java:35)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	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)
Caused by: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "pk_ce_scanner_context"
  Detail: Key (task_uuid)=(AVfXSZmBw72xhIYRytsz) already exists.
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2310)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2023)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:217)
	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:421)
	at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:166)
	at org.postgresql.jdbc.PgPreparedStatement.executeUpdate(PgPreparedStatement.java:137)
	at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)
	at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)
	at org.sonar.db.ce.CeScannerContextDao.insert(CeScannerContextDao.java:64)
	... 15 more