Error when trying to manually include option in Select from List field after saving translation

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X
• Fix Version/s: 7.1.X, 7.2.10 DXP FP7, 7.2.X
• Component/s: Forms
• Labels:
  • ee-ts
  • liferay-fixpack-dxp-7-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/19854

Steps to reproduce:

1. Go to Content & Data > Forms;
2. Click to add a new form;
3. Add a Select from List field and insert two manual options;
4. Publish the form;
5. Add a new translation;
6. Translate all the values (title, field name and its options);
7. Save the form;
8. Enter the field's settings again and try to include a new option.

Expected behavior:
The user is able to include a new option and save the form successfully afterwards.

Actual behavior:
On 7.2.x: browser's console shows error message and new option is not persisted.
On 7.1.x: you can add the option, but, when you click to save the form, Liferay shows a generic error message instead of a success one.