An error occurred while accessing the database

Due to a problem with the database Openads couldn't retrieve or store data. If this problem is reproducable it might be caused by a bug in Openads. Please report the following information to the creators of Openads. Also try to describe the actions that led to this error as clearly as possible.

Version:   	Openads v2.3.34-beta)
PHP/DB:	PHP 5.1.6 / MySQL 5.0.24a-Debian_9ubuntu2-log
Page:	/openads/openads-2.3.34/www/admin/channel-acl.php
Error:	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 '' at line 1
Query:	

SELECT compiledlimitation FROM oa_channel WHERE channelid = 

$_POST:	

Array
(
    [agencyid] => 0
    [channelid] => 
    [acl] => Array
        (
            [0] => Array
                (
                    [logical] => and
                    [type] => Client:Domain
                    [executionorder] => 0
                    [comparison] => ==
                    [data] => male
                )

            [1] => Array
                (
                    [logical] => and
                    [type] => Site:Variable
                    [executionorder] => 1
                    [comparison] => ==
                    [data] => Array
                        (
                            [0] => age
                            [1] => 18
                        )

                )

        )

    [type] => Citex:Hakim
    [submit] => Save Changes
)

$_GET:	

Empty