Describe the Bug

The rules don't prevent message flows from being created in processes when multiple elements are created at once. The rules check only if the message flow can connect source and target but doesn't check the parent.

Steps to Reproduce

1. Copy message flow including source and target
2. Delete all elements (creates process)
3. Paste
4. 💥

Expected Behavior

Create is prevented

Environment

• Library version: 13.0.4