Description of problem:
If the user enters name of an existing process when creating a new one (which can happen accidentally), the old process will be overwritten with the new one (effectively cleared) without any warning/confirmation prompt. The user may not even notice.

Version-Release number of selected component (if applicable):
ER1

How reproducible:
-

Steps to Reproduce:
1. create a new process named "proc"
2. make some changes (Start -> Task -> End), save it and close it
3. repeat step one

Actual results:
Attempt to create a process with existing name is successful, no warning before overwriting the existing process.

Expected results:
Either prompt the user to confirm the destructive action or, preferably, to be consistent with other asset types, fail with "File already exists" error.

Additional info: