Hello Yazici,
You could use the ***_prev attributes in condition but keep in the mind that they are local attributes.
This means the following...
Most of time they are blank. Only when you are editing the ticket and change that attribute, at that moment
that ***_prev has the previous value if you change this attribute.
In your case, it will not work as the "Status Previous" would always be blank.
Hope this helps
Thanks
Chi