As title says, if the board is empty then you can delete it.
But if there are topics within the board...... then the error comes out:
Wrong value type sent to the database. Array of integers expected. (current_topic)
:'(
No hint on file and line of code in the error log?
Oh woops...
Type of error: Critical
Wrong value type sent to the database. Array of integers expected. (current_topic)
Function: topicAttribute
sources/subs/Topic.subs.php
Line: 1947