Fatal Error in Studio theme

I added Studio themes to the content directory and

Fatal error: Cannot redeclare bp_dtheme_object_template_loader() (previously declared in C:\x\htdocs\realtasia\wp-content\plugins\buddypress\bp-themes\bp-default\_inc\ajax.php:67) in C:\x\htdocs\realtasia\wp-content\themes\studio\_inc\ajax.php on line 72

Shouldn't the ajax.php in the Studio theme be wrapped with if function exists() conditions if the file is duplicated. But that said, it will be unnecessary overhead for a check for each function.

Since buddypress includes the default theme functions, is this file really needed?