In Codoforum 3.1, when deleting one of the discussion categories - such as 'Bug Reports' or 'Let Us Know' - I get the following error:

Warning: implode(): Invalid arguments passed in /Users/Shared/codoforum/admin/modules/categories.php on line 132

Fatal error: Uncaught exception 'Illuminate\Database\QueryException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 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 'AS g LEFT JOIN codo_topics AS t ON g.topic_id=t.topic_id WHERE t.cat_in IN' at line 1 (SQL: DELETE FROM codo_tags AS g LEFT JOIN codo_topics AS t ON g.topic_id=t.topic_id WHERE t.cat_in IN )' in /Users/Shared/codoforum/sys/vendor/illuminate/database/Illuminate/Database/Connection.php:555 Stack trace: #0 /Users/Shared/codoforum/sys/vendor/illuminate/database/Illuminate/Database/Connection.php(362): Illuminate\Database\Connection->run('DELETE FROM cod...', Array, Object(Closure)) #1 /Users/Shared/codoforum/sys/vendor/illuminate/database/Illuminate/Database/Connection.php(319): Illuminate\Database\Connection->affectingStatement('DELETE FROM cod...', Array) #2 [internal function]: Illuminate\Database\Connection->delete('DELETE FROM cod...') #3 /Users/Sh in /Users/Shared/codoforum/sys/vendor/illuminate/database/Illuminate/Database/Connection.php on line 555

It seems that the deletion does go through - the categories are no longer there - but it is very unsettling nevertheless...