Fixed In This Release
Attribute Types Can No Longer Be Changed
Once you have created an attribute, you are no longer able to edit the attribute and change the type of Attribute that it is. For example, if you had a String attribute, you can not edit it and change the type to DateTime because parsing the existing String values into valid DateTime values is not a solvable problem. If you need to change the type of an Attribute, you will need to create a new Attribute of the correct type.