Well at last!!!
Generall documentation don´t have to be unique name. This "saint rule" is only for CAD documentation.
My solution:
25.2.2014 --- export drw to PDF and saved it to sudirectory ...export / 2014_02_25 / 15009_V01-00_00_00.pdf
30.2.2014 --- export drw to PDF and saved it to sudirectory ...export / 2014_02_30 / 15009_V01-00_00_00.pdf
Result:
The day when l learn nothing is lost