style.ctcbackup.css

Hello,
the a. m. website is protected by .htaccess (test / test123test). After creating a child theme of twentytwentytwo I found this file https://wp-tests.com/wp-content/themes/twentytwentytwo-child/style.ctcbackup.css. It has not been there with previous versions of the plugin. Obviously it creates a backup of style.css. But when? Please tell me more about this.

Many thanks
Thomas

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