Query failed! You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND ativo=1 GROUP BY playerID' at line 1

Backtrace:
Array
(
    [0] => Array
        (
            [file] => /home/chessman/public_html/webchess/includes/classes/Database.class.inc
            [line] => 78
            [function] => read_query
            [class] => Database
            [object] => Database Object
                (
                    [queries:protected] => Array
                        (
                        )

                    [read_count:protected] => 1
                    [write_count:protected] => 0
                )

            [type] => ->
            [args] => Array
                (
                    [0] => select p.* from logincookies as a JOIN (logincookies as b, players as p) where p.playerID = a.player_id AND a.cookie = b.cookie AND b.player_id =  AND ativo=1 GROUP BY playerID
                    [1] => 
                    [2] => 15
                    [3] => 
                )

        )

    [1] => Array
        (
            [file] => /home/chessman/public_html/webchess/includes/cookiecheck.php
            [line] => 52
            [function] => query
            [class] => Database
            [object] => Database Object
                (
                    [queries:protected] => Array
                        (
                        )

                    [read_count:protected] => 1
                    [write_count:protected] => 0
                )

            [type] => ->
            [args] => Array
                (
                    [0] => select p.* from logincookies as a JOIN (logincookies as b, players as p) where p.playerID = a.player_id AND a.cookie = b.cookie AND b.player_id =  AND ativo=1 GROUP BY playerID
                )

        )

    [2] => Array
        (
            [file] => /home/chessman/public_html/webchess/chess-join-game.php
            [line] => 21
            [function] => shares_cookies_with_players
            [args] => Array
                (
                    [0] => 
                )

        )

)