Solved
Why can't I edit Data Type in a MDA object?
I have just created an object in the MDA Data Management section, based on a .csv. And the system has automatically set-up some default data types, many of them Boolean instead of number, and I've realized that only after the object was created. Now I need to change the type, but I cannot do that. So I have to send a ticket to delete this object and start all over again.