Existing index field cannot be set to the TABLE field type

Question / Problem: 

Why is it not possible to set an existing index field to the (TABLE) field type?

Answer / Solution: 

It is not possible because an existing index field that was previously saved in the Document Class properties cannot be set to the (TABLE) field type.

The (TABLE) field type must be set when creating a new index field to the Document Class properties.

Applies to: