This warning occurs when a table from the relational part of the model has no corresponding entity. For example, when you delete a persistent class from the Visual Designer, the corresponding table is not automatically deleted from the model.
To resolve this warning, you should manually map the table to a persistent capable class:
- In the Visual Designer, open the Model Schema Explorer.
- Expand the Tables node and locate the table.
- Right-click the table and select Create Domain Class from the context menu.