The Discriminator Value Of The Persistent Type Is Already Used
This article is relevant to entity models that utilize the deprecated Visual Studio integration of Telerik Data Access. The current documentation of the Data Access framework is available here.
This error occurs when two or more persistent classes that participate in an inheritance hierarchy have duplicated discriminator values.
Solution
To resolve this error, enter a unique discriminator value:
- Double-click the warning to open the Validation Dialog.
-
Specify a discriminator value for the persistent class.