A problem was encountered and reported via ocflib: An exception occured in create: Traceback (most recent call last): File "/opt/create/venv/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 1710, in delete state = attributes.instance_state(instance) AttributeError: 'NoneType' object has no attribute '_sa_instance_state' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py", line 367, in trace_task R = retval = fun(*args, **kwargs) File "/opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py", line 622, in __protected_call__ return self.run(*args, **kwargs) File "/opt/create/venv/lib/python3.5/site-packages/ocflib/account/submission.py", line 304, in reject_request stored_request = get_remove_row_by_user_name(user_name) File "/opt/create/venv/lib/python3.5/site-packages/ocflib/account/submission.py", line 292, in get_remove_row_by_user_name session.delete(request_row) File "/opt/create/venv/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 1712, in delete raise exc.UnmappedInstanceError(instance) sqlalchemy.orm.exc.UnmappedInstanceError: Class 'builtins.NoneType' is not mapped Task Details: * task_id: 9853248b-ee73-49c2-902c-0199d59033ba Try `journalctl -u ocf-create` for more details. ==== Hostname: 41424c6fc0e1 Callstack: at /opt/create/venv/lib/python3.5/site-packages/ocflib/misc/mail.py:94 (send_problem_report) by /opt/create/create/tasks.py:88 (failure_handler) by /opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py:205 (handle_failure) by /opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py:157 (handle_error_state) by /opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py:323 (on_error) by /opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py:381 (trace_task) by /opt/create/venv/lib/python3.5/site-packages/celery/app/trace.py:530 (_fast_trace_task) by /opt/create/venv/lib/python3.5/site-packages/billiard/pool.py:359 (workloop) by /opt/create/venv/lib/python3.5/site-packages/billiard/pool.py:290 (__call__) by /opt/create/venv/lib/python3.5/site-packages/billiard/process.py:112 (run) by /opt/create/venv/lib/python3.5/site-packages/billiard/process.py:306 (_bootstrap) by /opt/create/venv/lib/python3.5/site-packages/billiard/popen_fork.py:79 (_launch) by /opt/create/venv/lib/python3.5/site-packages/billiard/popen_fork.py:24 (__init__) by /opt/create/venv/lib/python3.5/site-packages/billiard/context.py:333 (_Popen) by /opt/create/venv/lib/python3.5/site-packages/billiard/process.py:122 (start) by /opt/create/venv/lib/python3.5/site-packages/billiard/pool.py:1117 (_create_worker_process) by /opt/create/venv/lib/python3.5/site-packages/celery/concurrency/asynpool.py:439 (_create_worker_process) by /opt/create/venv/lib/python3.5/site-packages/billiard/pool.py:1008 (__init__) by /opt/create/venv/lib/python3.5/site-packages/celery/concurrency/asynpool.py:422 (__init__) by /opt/create/venv/lib/python3.5/site-packages/celery/concurrency/prefork.py:112 (on_start) by /opt/create/venv/lib/python3.5/site-packages/celery/concurrency/base.py:131 (start) by /opt/create/venv/lib/python3.5/site-packages/celery/bootsteps.py:370 (start) by /opt/create/venv/lib/python3.5/site-packages/celery/bootsteps.py:119 (start) by /opt/create/venv/lib/python3.5/site-packages/celery/worker/worker.py:203 (start) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/worker.py:256 (run) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/base.py:244 (__call__) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/worker.py:221 (run_from_argv) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/celery.py:412 (execute) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/celery.py:480 (handle_argv) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/base.py:281 (execute_from_commandline) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/celery.py:488 (execute_from_commandline) by /opt/create/venv/lib/python3.5/site-packages/celery/bin/celery.py:326 (main) by /opt/create/venv/lib/python3.5/site-packages/celery/__main__.py:14 (main) by /opt/create/venv/bin/celery:11 (<module>)