Empty Selection fields delete the entire page

• Type: Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: Master
• Fix Version/s: None
• Component/s: Data Engine
• Labels:
  • migration_to_dataengine
• Fix Priority: 5

Description
Empty Selection fields delete the entire page in Document Types and Metadata Sets.

Steps to Reproduce

1. Go to Content & Data > Documents and Media
2. Create new Document Type
3. Select some fields
4. Save it
5. Open the new created Document Type and add any Selection Field
6. Try to save the document with no option(default) in the selection field
7. A error message appears, then click Cancel
8. Open the document again

Expected Result
After clicking Cancel, it should keep the previously saved changes.
Actual Result
After clicking Cancel, the entire page is deleted. ( ActualResult_Feb17_LPS-128023.mp4 )

Reproduced In
master: 40f7efe759d23ccfb1c449054932019ce1397b7e