jBPM sub process moving isn't proceeded correctly

Steps:
1. Have jBPM 3 project
2. Create process1
3. Create process2 under project1
4. Try to move it

ERROR: Drag&Drop -> process2 into src/main/jpdl ---> Name conflict
ERROR: Context Menu -> Refactor -> Move ----> A package cannot be moved to its own parent

I guess both is wrong behaviour, Drag and Drop should work in standard way and process should be able to move into src/main/jpdl folder