Aanmaken van tabel gaat niet goed

<?php
function plugin__activate() {	
	global $wpdb;
	$charset_collate = $wpdb->get_charset_collate();
	$item_table = $wpdb->prefix . "jb_menu"; 
	$sql = array();
	if($wpdb->get_var("SHOW TABLES LIKE '$item_table'") != $item_table) {
		$sql[] = "CREATE TABLE $item_table (
    	id int(11) NOT NULL AUTO_INCREMENT,
		name varchar(255),
		group int(11),
		price varchar(255),
    	PRIMARY KEY  (id)
    	) $charset_collate;";
		require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
		dbDelta( $sql );
	}
}
?>