Conversion fails if root page is not available in all converted versions

Conversion to Scroll Documents fails if the root page of the space is not available in all versions selected for conversion.

To reproduce

1. Create a space with 3 versions (based on each other)

2. Create a page in the last version and make this the top level page of the space

3. Convert the space in all its versions to Scroll Documents

Conversion fails with an error Published instance has no content!

• In 4.5.7 with an error message in the UI

• in 4.6.0 during conversion with an error

(space and version in which the root page is available gets created)

Workaround

• Make the root page unversioned or available in all versions.