Bench update Error OSError: [Errno 21] Is a directory: ‘./[SITENAME}/private/backups/.npm

When I am trying to update 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”, lin e 94, in
main()
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, lin e 18, in main
click.Group(commands=commands)(prog_name=‘bench’)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/co re.py”, line 722, in call
return self.main(*args, **kwargs)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/co re.py”, line 697, in main
rv = self.invoke(ctx)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/co re.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/co re.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/co re.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/co re.py”, line 535, in invoke
return callback(*args, **kwargs)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/de corators.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 289 , in backup
odb = scheduled_backup(ignore_files=not with_files, backup_path_db=backup_pa th_db, backup_path_files=backup_path_files, backup_path_private_files=backup_pat h_private_files, force=True)
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/backups.py”, line 166 , in scheduled_backup
odb = new_backup(older_than, ignore_files, backup_path_db=backup_path_db, ba ckup_path_files=backup_path_files, force=force)
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/backups.py”, line 170 , in new_backup
delete_temp_backups(older_than = frappe.conf.keep_backups_for_hours or 24)
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/backups.py”, line 189 , in delete_temp_backups
os.remove(this_file_path)
OSError: [Errno 21] Is a directory: ‘./[SITENAME}/private/backups/.npm’