5.1 Sort Sub-catagories error
 

I get this when I try to sort sub-catagories. Any help?

The OMSA Medal Database Message
We're sorry, but the system experienced an unrecoverable error. Please try again later.

Script: adm-cats

Query: SELECT children,parent FROM vb3_categories where id=

Result: 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 '' at line 1

Database handle: Resource id #34

uploaded all the /.php files again with a fresh download, and it works now.