Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: fcdca6a1-7790-10d8-0ec6-8cff8fbb37bc.

Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: fcdca6a1-7790-10d8-0ec6-8cff8fbb37bc.