create child theme bug? | WordPress.org

New clean theme with TT4 theme,
Import some content
Install Create Block theme Plugin v. 2.0.2, activate it
Create Block Theme child
Try to upoad it. Get error msg. “

Installing theme from uploaded file: tt4childdev08.zip

Unpacking the package…

Installing the theme…

Destination folder already exists. /www/wp-content/themes/twentytwentyfour/This theme is already installed.ActiveUploadedTheme nameTwenty Twenty-Fourtt4childdev08Version1.11.0.0Authorthe WordPress team-Required WordPress version6.46.0Required PHP version7.05.7Parent theme-twentytwentyfour

You are uploading an older version of the active theme. You can continue to install the older version, but be sure to back up your database and files first.

Replace active with uploaded?

Messages in Dashboard: The active theme is broken. Reverting to the default theme.Dismiss this notice.

Error: The theme defines itself as its parent theme. Please check the Template header.

White screen result