add custom attribute to button shortcode

I want to add a custom attribute (data-ycbm-modal) to my button shortcode like this:

[su_button url="https://example.org"  data-ycbm-modal="true" style="3d" background="#218c96" wide="yes" icon="icon: calendar" class="custombutton"]Text[/su_button]

but it gets deleted.

https://ww.wp.xz.cn/plugins/shortcodes-ultimate/