KeyError: 'fieldname' error

[centaur78]

Hi

Just did the bench update right now.... getting the below error

Patching sites...
Migrating site1.local
Updating DocTypes for frappe        : [========================================] 100%
Updating DocTypes for erpnext       : [=======================                 ] 59%Traceback (most recent call last):
  File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 104, in <module>
    main()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 18, in main
    click.Group(commands=commands)(prog_name='bench')
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/commands/__init__.py", line 26, in _func
    ret = f(frappe._dict(ctx.obj), *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/commands/site.py", line 309, in migrate
    skip_search_index=skip_search_index
  File "/home/frappe/frappe-bench/apps/frappe/frappe/migrate.py", line 68, in migrate
    frappe.model.sync.sync_all(verbose=verbose)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/sync.py", line 17, in sync_all
    sync_for(app, force, verbose=verbose, reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/sync.py", line 68, in sync_for
    reset_permissions=reset_permissions, for_sync=True)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 67, in import_file_by_path
    ignore_version=ignore_version, reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 103, in import_doc
    controller.prepare_for_import(docdict)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/core/doctype/doctype/doctype.py", line 527, in prepare_for_import
    remaining_field_names = [f['fieldname'] for f in docdict.get('fields', [])]
  File "/home/frappe/frappe-bench/apps/frappe/frappe/core/doctype/doctype/doctype.py", line 527, in <listcomp>
    remaining_field_names = [f['fieldname'] for f in docdict.get('fields', [])]
KeyError: 'fieldname'

[centaur78]

Issue resolved here frappe/erpnext#26977