Selection overlaps with an area

What causes this issue?

You cannot extend the block to be moved or copied if the limits of an
area for subscreens have been exceeded.

How to fix this error?

The block can only be processed in its current size. If you want to
move an existing area for subscreens, you can only do this for
individual areas using the select function or the area definition.

Error message extract from SAP system. Copyright SAP SE.