Description of problem:
Application does not react if user try to create a process definition which already exist. It just rewrite the last state of process definition (delete all changes and process is empty)

Version-Release number of selected component (if applicable):
6.0.0 DR6

How reproducible:

Steps to Reproduce:
1. go to project authoring (jbpm-playground, Evaluation)
2. create new BPMN2 process definition "evaluation (already exist)

Actual results:
open "Evaluation" process and delete last changes. Until it the process is empty

Expected results:
Alert about conflict (Same behaviour as for DRL file)

Additional info:
There is difference in using git users. Designer use "admin", DRL use "sona" (I log into business-central as user "sona")