Pulp

We have two pulp servers that we upgraded from 2.6 to 2.8.3 this morning.
After the upgrade, a number of repositories fail with "The field 'filelist' does not exist on the document 'RPM'":

+----------------------------------------------------------------------+
                              Task Details
+----------------------------------------------------------------------+

Operations:       sync
Resources:        RHEL6_repo_x86_64 (repository)
State:            Failed
Start Time:       2016-05-27T13:14:15Z
Finish Time:      2016-05-27T13:15:04Z
Result:           N/A
Task Id:          0f4e90cf-cee3-41cc-934b-b506ab36a488
Progress Report:
  Yum Importer:
    Comps:
      State: NOT_STARTED
    Content:
      Details:
        Drpm Done:  0
        Drpm Total: 0
        Rpm Done:   0
        Rpm Total:  0
      Error:         The field 'filelist' does not exist on the document 'RPM'
      Error Details:
      Items Left:    0
      Items Total:   0
      Size Left:     0
      Size Total:    0
      State:         FAILED
    Distribution:
      Error Details:
      Items Left:    0
      Items Total:   0
      State:         NOT_STARTED
    Errata:
      State: NOT_STARTED
    Metadata:
      State: FINISHED
    Purge Duplicates:
      State: NOT_STARTED
Traceback:        Traceback (most recent call last):   File
                  "/usr/lib/python2.6/site-packages/celery/app/trace.py", line
                  240, in trace_task     R = retval = fun(*args, **kwargs)
                  File
                  "/usr/lib/python2.6/site-packages/pulp/server/async/tasks.py",
                  line 473, in __call__     return super(Task,
                  self).__call__(*args, **kwargs)   File
                  "/usr/lib/python2.6/site-packages/pulp/server/async/tasks.py",
                  line 103, in __call__     return super(PulpTask,
                  self).__call__(*args, **kwargs)   File
                  "/usr/lib/python2.6/site-packages/celery/app/trace.py", line
                  437, in __protected_call__     return self.run(*args,
                  **kwargs)   File
                  "/usr/lib/python2.6/site-packages/pulp/server/controllers/repo
                  sitory.py", line 810, in sync     raise
                  pulp_exceptions.PulpExecutionException(_('Importer indicated a
                  failed response')) PulpExecutionException: Importer indicated
                  a failed response