Fix updating systems sometimes items

app/Models/Address.php

@@ -337,7 +337,7 @@ class Address extends Model
 			throw new InvalidFTNException(sprintf('Invalid FTN: [%s] - point address invalid [%d]',$ftn,$matches[4]));
 
 		// Work out region
-		$region_id = 0;
+		$region_id = NULL;
 		$zone_id = NULL;
 
 		// We can only work out region/zone if we have a domain - this is for 2D parsing