Bench update error to v7.1 in production

i just ran a bench update, I am running the production image.
then i got this

Migrating bricks
Executing frappe.patches.v7_1.rename_scheduler_log_to_error_log in brick
s (b11d06389cc4ae8a)
Success
Executing execute:frappe.reload_doc(‘core’, ‘doctype’, ‘doctype’, force=
True) #2016-10-17 in bricks (b11d06389cc4ae8a)
Success
Executing execute:frappe.reload_doc(‘core’, ‘doctype’, ‘user’) in bricks
(b11d06389cc4ae8a)
Success
Executing execute:frappe.clear_cache() in bricks (b11d06389cc4ae8a)
Success
Executing frappe.patches.v7_1.sync_language_doctype in bricks (b11d06389
cc4ae8a)
Traceback (most recent call last):
File “/usr/lib/python2.7/runpy.py”, line 162, in _run_module_as_main
main”, fname, loader, pkg_name)
File “/usr/lib/python2.7/runpy.py”, line 72, in _run_code
exec code in run_globals
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.
py”, line 79, in
main()
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.
py”, line 16, in main
click.Group(commands=commands)(prog_name=‘bench’)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/core.py”, line 716, in call
return self.main(*args, **kwargs)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/core.py”, line 696, in main
rv = self.invoke(ctx)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/core.py”, line 1060, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/core.py”, line 1060, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/core.py”, line 889, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/core.py”, line 534, in invoke
return callback(*args, **kwargs)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/
click/decorators.py”, line 17, in new_func
return f(get_current_context(), *args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/commands/init.p
y”, line 24, in _func
ret = f(frappe._dict(ctx.obj), *args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/commands/site.py”,
line 209, in migrate
migrate(context.verbose, rebuild_website=rebuild_website)
File “/home/frappe/frappe-bench/apps/frappe/frappe/migrate.py”, line 3
0, in migrate
frappe.modules.patch_handler.run_all()
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/patch_handl
er.py”, line 29, in run_all
if not run_single(patchmodule = patch):
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/patch_handl
er.py”, line 63, in run_single
return execute_patch(patchmodule, method, methodargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/patch_handl
er.py”, line 83, in execute_patch
frappe.get_attr(patchmodule.split()[0] + “.execute”)()
File “/home/frappe/frappe-bench/apps/frappe/frappe/patches/v7_1/sync_l
anguage_doctype.py”, line 5, in execute
frappe.reload_doc(‘core’, ‘doctype’, ‘language’)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line
645, in reload_doc
return frappe.modules.reload_doc(module, dt, dn, force=force)
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/utils.py”,
line 141, in reload_doc
return import_files(module, dt, dn, force=force)
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file
.py”, line 17, in import_files
return import_file(module, dt, dn, force=force, pre_process=pre_proc
ess)
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file
.py”, line 22, in import_file
ret = import_file_by_path(path, force, pre_process=pre_process)
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file
.py”, line 54, in import_file_by_path
import_doc(doc, force=force, data_import=data_import, pre_process=pr
e_process)
File “/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file
.py”, line 122, in import_doc
doc.insert()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”,
line 222, in insert
self.run_post_save_methods()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”,
line 771, in run_post_save_methods
self.run_method(“on_update”)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”,
line 654, in run_method
out = Document.hook(fn)(self, *args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”,
line 882, in composer
return composed(self, method, *args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”,
line 865, in runner
add_to_return_value(self, fn(self, *args, **kwargs))
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”,
line 648, in
fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kw
args)
File “/home/frappe/frappe-bench/apps/frappe/frappe/core/doctype/doctyp
e/doctype.py”, line 142, in on_update
updatedb(self.name, self)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/db_schema.py”
, line 69, in updatedb
tab.sync()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/db_schema.py”
, line 146, in sync
self.create()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/db_schema.py”
, line 181, in create
engine=self.meta.engine or ‘InnoDB’) % (self.name, add_text))
AttributeError: ‘DocType’ object has no attribute ‘engine’

please help

i ran

bench migrate
bench update --patch
bench update

now it’s fine.