Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: 5f1ceba1-c77e-10d8-0ec6-899d0304ef6e.

Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: 5f1ceba1-c77e-10d8-0ec6-899d0304ef6e.