This is a follow up of issue 48466.

Create a new impress document.
Assign the 'Title, Text' layout.
Insert text into the outline text shape. One entry on level 1, one entry on level 2.
Copy the entry on level 2 and paste it as new shape.
Try to save the document.

Saving fails (if the fix for issue 48466 is not present) because the style of
the pasted shape has no 'Family' property.  This leads to an
UnknownPropertyException and causes an abort of the saving operation.

This does not happen when a level 3 entry exists and is copied and pasted along
with the level 2 entry.