Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: 86aa99a1-c96d-e014-6eb5-35e0af58c145.

Web Part Error: The control type 'System.Decimal' is not allowed on this page. Correlation ID: 86aa99a1-c96d-e014-6eb5-35e0af58c145.