SQL ERROR [ mysqli ]

Out of range value for column 'left_id' at row 1 [1264]

SQL

UPDATE phpbb_forums SET left_id = left_id + CASE WHEN left_id BETWEEN 31 AND 16 THEN -30 ELSE -14 END, right_id = right_id + CASE WHEN right_id BETWEEN 31 AND 16 THEN -30 ELSE -14 END, forum_parents = '' WHERE left_id BETWEEN 1 AND 16 AND right_id BETWEEN 1 AND 16

BACKTRACE

FILE: includes/db/mysqli.php
LINE: 163
CALL: dbal->sql_error()

FILE: includes/acp/acp_forums.php
LINE: 1902
CALL: dbal_mysqli->sql_query()

FILE: includes/acp/acp_forums.php
LINE: 256
CALL: acp_forums->move_forum_by()

FILE: includes/functions_module.php
LINE: 507
CALL: acp_forums->main()

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