Export fixtures error

Hi.

I want to back up one Custom Role I have created, so it will be created every time I install the app in a new enviorenment.

I added this code in hooks.py in my app:

fixtures = [{
    'doctype': 'Role',
    'filters': {
        'name': ['in', 'CustomerTest2']
    }
}]

Later I executed this code:

bench --site (nameofmysite) export-fixtures

Is was successfully generated fixtures in erpnext app and my app.

The problem is that when I execute bench migrate I get this error:

Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, 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 94, 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/local/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 1066, 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 1066, 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 895, 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 535, 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 217, in migrate
    migrate(context.verbose, rebuild_website=rebuild_website)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/migrate.py", line 35, in migrate
    sync_fixtures()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/fixtures.py", line 24, in sync_fixtures
    ignore_links=True, overwrite=True)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/core/page/data_import_tool/data_import_tool.py", line 95, in import_doc
    frappe.modules.import_file.import_file_by_path(f, data_import=True, force=True, pre_process=pre_process, reset_permissions=True)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 58, 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 130, in import_doc
    doc.insert()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 204, in insert
    self.db_insert()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/base_document.py", line 315, in db_insert
    self.show_unique_validation_message(e)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/base_document.py", line 364, in show_unique_validation_message
    raise_(frappe.UniqueValidationError, (self.doctype, self.name, e), traceback)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/base_document.py", line 299, in db_insert
    ), list(d.values()))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/database.py", line 154, in sql
    self._cursor.execute(query, values)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/MySQLdb/cursors.py", line 250, in execute
    self.errorhandler(self, exc, value)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/MySQLdb/connections.py", line 50, in defaulterrorhandler
    raise errorvalue
frappe.exceptions.UniqueValidationError: (u'Web Form', u'manage-events-1', IntegrityError(1062, "Duplicate entry 'manage-events' for key 'route'"))