One node is deleted when the user tries to use the same Node ID for two nodes
Steps to Reproduce:
- Go to Open menu > Workflow > Process Builder > Plus button
- Click on End node and fill in the Node ID field with "node_0"
The system should inform the user that the name is already in use.
The Start node is deleted.
Verified on master: 758c99bd5bac7693e03bf1ec877eaf329bd6f229