Dynpro & & was added

What causes this issue?

The screen was copied successfully.

System Response

The screen was saved but not generated. If the screen is called during
the transaction, it is generated if it contains no errors.

How to fix this error?

You can edit the new screen with the Screen Painter. You can also check
it for errors and then generate it.

Error message extract from SAP system. Copyright SAP SE.