How to reproduce:
1. export the definition of, f.e., the Folder ContentType from eZP 2014.11 (using the ez5 content API, not REST)
2. try to create a new ContentType, with any random name, using the Field definitions taken from the Folder fields
3. you will get an error: the fieldSettings do not validate!

In particular:

• for xmltext fields, the settings contain a tagPreset = '' value, whereas only 0 and 1 are valid values
• for ezpage fields, the settings contain a defaultLayout = '' value, which is not valid

(but there might be more, of course)

What I expect: to be able to use the fieldSettings of existing ContentType fields to be able to create new ContentTypes.