Description:
When entering a new record in an ODT nested subform using a table field LibreOffice Base raises an error if not all field values are entered although they are not mandatory. Clicking on the 'OK' button subsequently crashes the program.

This error is new with the current version under Mac Mojave and was not there before!

Steps to Reproduce:
1.Use an ODB database with dependent tables, eg. appointments with several activities including non mandatory fields
2.Use an ODT form allowing to enter new appointments with new activities using tables in nested subforms
3.Enter the new appointment
4. Enter a new activity for that appointment and do not fill non mandatory fields.

Actual Results:
Libreoffice Base raises an error telling you, that you have not entered all mandatory fields. Then crashes after closing the message box

Expected Results:
New activity stored in database


Reproducible: Always


User Profile Reset: No



Additional Info:
[Information automatically included from LibreOffice]
Locale: de
Module: StartModule
[Information guessed from browser]
OS: Mac OS X (All)
OS is 64bit: yes

Version: 6.1.2.1
Build-ID: 65905a128db06ba48db947242809d14d3f9a93fe
CPU-Threads: 4; BS: Mac OS X 10.14.1; UI-Render: Standard; 
Gebietsschema: de-CH (de_CH.UTF-8); Calc: group threaded