Ticket #28529: 28529.1.diff

src/wp-admin/includes/class-wp-ms-users-list-table.php

@@ -183 +183 @@
          * @param WP_User $user The current WP_User object.
          */
         public function column_cb( $user ) {
+                if ( is_super_admin( $user->ID ) ) {
+                        return;
+                }
                 ?>
                 <label class="screen-reader-text" for="blog_<?php echo $user->ID; ?>"><?php echo sprintf( __( 'Select %s' ), $user->user_login ); ?></label>
                 <input type="checkbox" id="blog_<?php echo $user->ID ?>" name="allusers[]" value="<?php echo esc_attr( $user->ID ) ?>" />