bench update error erpnext.patches.v7_0.fix_duplicate_icons

Executing erpnext.patches.v7_0.fix_duplicate_icons in site1.local (1bd3e0294d)
Module import failed for Desktop Icon (frappe.core.doctype.desktop_icon.desktop_icon)
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 <module>
    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__.py", 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 30, in migrate
    frappe.modules.patch_handler.run_all()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/patch_handler.py", line 29, in run_all
    if not run_single(patchmodule = patch):
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/patch_handler.py", line 63, in run_single
    return execute_patch(patchmodule, method, methodargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/patch_handler.py", line 83, in execute_patch
    frappe.get_attr(patchmodule.split()[0] + ".execute")()
  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/patches/v7_0/fix_duplicate_icons.py", line 11, in execute
    sync_desktop_icons()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/desk/doctype/desktop_icon/desktop_icon.py", line 296, in sync_desktop_icons
    sync_from_app(app)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/desk/doctype/desktop_icon/desktop_icon.py", line 325, in sync_from_app
    'owner': 'Administrator'
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 589, in get_doc
    return frappe.model.document.get_doc(arg1, arg2)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 45, in get_doc
    controller = get_controller(doctype)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/base_document.py", line 34, in get_controller
    module = load_doctype_module(doctype, module_name)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/utils.py", line 171, in load_doctype_module
    doctype_python_modules[key] = frappe.get_module(module_name)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 654, in get_module
    return importlib.import_module(modulename)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: No module named desktop_icon.desktop_icon