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Changes between Initial Version and Version 1 of Ticket #16176, comment 9

-              initial
+              v1
 In my opinion there are three possible solutions:
   * delete all class attributes that will be overwritten by fields later (e.g. in add_to_class after the "contribute-to-class" check")
   * delete class attributes that have a `__set__` method defined
+  * ~~delete~~ //overwrite// all class attributes //with None// that will be overwritten by fields later (e.g. in add_to_class after the "contribute-to-class" check")
+  * ~~delete~~ //overwrite// class attributes //with None// that have a `__set__` method defined
   * set the class attributes to a specific value (e.g. a to be written class) to mark them as to be overwritten later (melinath's suggestion)