The forum island insert is generally used to display ads between the first and second posts in a thread; and where there is currently no indication which islands are currently utilized and where, you can use an SQL query to...

Show all forums using a forum island insert (any island):
SQL Query
SELECT `FORUM_TITLE`, `FORUM_ID` FROM `ubbt_FORUMS` WHERE `FORUM_ISLAND_INSERT`!='0' ORDER BY `FORUM_TITLE` ASC


Show all forums using a specific forum island insert (island 1):
SQL Query
SELECT `FORUM_TITLE`, `FORUM_ID` FROM `ubbt_FORUMS` WHERE `FORUM_ISLAND_INSERT`='1' ORDER BY `FORUM_TITLE` ASC


Update the forum island insert for a specific forum (island 1, forum 5):
SQL Query
UPDATE `ubbt_FORUMS` SET `FORUM_ISLAND_INSERT` = '1' WHERE `FORUM_ID` = '5';


Update the forum island insert for specific forums (island 1, forum 5, 6, 8):
SQL Query
UPDATE `ubbt_FORUMS` SET `FORUM_ISLAND_INSERT` = '1' WHERE (`FORUM_ID` = '5' OR `FORUM_ID` = '6' OR `FORUM_ID` = '8');


Clear the forum island insert for a specific forum (forum 5):
SQL Query
UPDATE `ubbt_FORUMS` SET `FORUM_ISLAND_INSERT` = '0' WHERE `FORUM_ID` = '5';