How to stop alert emails on new media?

It is in a panel named “Ignore Alerts” located in the plugin’ settings page.
The post-type is named “Attachment”.

Thanks for the feedback. I have ignored these alerts in the setups but still receive emails.
Could the reason be that I upload images directly from Lightroom using an extension?

I don’t know how that Lightroom extension works, so I can’t say that it is the cause of the issue. Install the development version of the code [1] and see if it fixes the issue.

[1] https://github.com/cixtor/sucuri-wordpress-plugin/archive/master.zip