Porfavor Ayuda! Error SQL Al Modif Permisos Foros

[oOTTOo]

Buenas:

Resulta que no me habia fiajado hasta ahora pero al intentar modificar los permisos de cualquier foro me da el siguiente error:

Código: Seleccionar todo

Error General
SQL ERROR [ postgres ]

ERROR: for SELECT DISTINCT, ORDER BY expressions must appear in select list []

SQL

SELECT DISTINCT u.user_id, u.username FROM phpbb_users u, phpbb_acl_users a WHERE u.user_id = a.user_id AND a.forum_id = 1 AND (a.auth_option_id IN (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30) OR a.auth_role_id IN (14, 15, 16, 17, 18, 19, 20, 21, 22)) ORDER BY u.username_clean, u.user_regdate ASC

BACKTRACE

FILE: includes/db/postgres.php
LINE: 177
CALL: dbal->sql_error()

FILE: includes/acp/acp_permissions.php
LINE: 1165
CALL: dbal_postgres->sql_query()

FILE: includes/acp/acp_permissions.php
LINE: 399
CALL: acp_permissions->retrieve_defined_user_groups()

FILE: includes/functions_module.php
LINE: 471
CALL: acp_permissions->main()

FILE: adm/index.php
LINE: 74
CALL: p_master->load_active()

¿Alguien sabe porque puede ser?

Gracias, un saludo.