[Bug] Row not deletable if ANY link field mandatory

[alexfacciorusso]

Describe the bug
If a table has even just one "Link" column that is mandatory ("Forbid non-empty values" checked), when the user tries to delete a row, an error appears.

To Reproduce
Steps to reproduce the behavior:

1. Create a table and make sure it's empty (no rows)
2. Add a "Link" column/field to any other table
3. Check the "Forbid non-empty values" option for that field
4. Add a row
5. Save
6. Try deleting that row
7. An error occurs

Expected behavior
The row should be deleted. It seems the app tries to nullify the values first and then delete the row, triggering a validation error.

Screenshots

** Client (please complete the following information):**

• OS: Linux Docker
• Browser: Edge
• Version: Latest Docker (1.5.2-alpha+build.713)

Additional context