I found the reason for this problem, as presumed it was a newbies mistake:
In the following link I found that I cant change an existing feild that already exists in prior indexs without doing doing a procedure (that I dont yet know how to do):
Although you can add new types to an index, or add new fields to a type, you can’t add new analyzers or make changes to existing fields. If you were to do so, the data that had already been indexed would be incorrect and your searches would no longer work as expected.