On Red Hat Satellite 6, Manifest refresh fails with error "Failed to import archive.

Issue

• Manifest refresh fails with error "Failed to import archive".
• Manifest refresh fails with the following error.

rg.quartz.JobExecutionException: javax.persistence.EntityExistsException: A different object with the same identifier value was already associated with the session : [org.candlepin.model.Entitlement#b513240a06144eecb05af38a9a3fc6f1]
        at org.candlepin.pinsetter.tasks.KingpinJob.refireCheck(KingpinJob.java:143) ~[KingpinJob.class:na]
        at org.candlepin.pinsetter.tasks.KingpinJob.execute(KingpinJob.java:111) ~[KingpinJob.class:na]
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202) ~[quartz-2.2.1.jar:na]
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573) [quartz-2.2.1.jar:na]
Caused by: javax.persistence.EntityExistsException: A different object with the same identifier value was already associated with the session : [org.candlepin.model.Entitlement#b513240a06144eecb05af38a9a3fc6f1]

• The error might also be:

2020-02-13 10:04:05,200 [thread=http-bio-8443-exec-44] [req=4d99e793-243a-4f5d-825d-beb94cfe9e1d, org=UBIS-Linux, csid=9072ec81] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: deadlock detected
  Detail: Process 4147 waits for ShareLock on transaction 3084380529; blocked by process 18285.
Process 18285 waits for ShareLock on transaction 3084379745; blocked by process 4147.
  Hint: See server log for query details.
2020-02-13 10:04:05,205 [thread=http-bio-8443-exec-44] [req=4d99e793-243a-4f5d-825d-beb94cfe9e1d, org=UBIS-Linux, csid=9072ec81] ERROR org.candlepin.sync.Importer - Failed to import archive