Google calendar error

{‘retry’: 0, ‘log’: <function log at 0x7f5f130b3668>, ‘site’: u’tradelink’, ‘event’: None, ‘method_name’: u’frappe.utils.background_jobs.run_doc_method’, ‘method’: <function run_doc_method at 0x7f5f13eba320>, ‘user’: u’Administrator’, ‘kwargs’: {‘doc_method’: u’run_current_mapping’, ‘name’: u’f894e7b4dd’, ‘doctype’: u’Data Migration Run’}, ‘async’: True, ‘job_name’: u’frappe.utils.background_jobs.run_doc_method’}
Traceback (most recent call last):
File “/home/kash/tradelink/apps/frappe/frappe/utils/background_jobs.py”, line 97, in execute_job
method(**kwargs)
File “/home/kash/tradelink/apps/frappe/frappe/utils/background_jobs.py”, line 76, in run_doc_method
getattr(frappe.get_doc(doctype, name), doc_method)(**kwargs)
File “/home/kash/tradelink/apps/frappe/frappe/data_migration/doctype/data_migration_run/data_migration_run.py”, line 75, in run_current_mapping
raise e
ValueError: astimezone() cannot be applied to a naive datetime