LibreWriter changes mail merge from text to numeric date

Libre 7.4.0.3
Mac Ventura

I have a Panorama database that creates a .csv for mail merge.
One of the fields is «DueDate». That field is a text field of the date in the database, ie: 10/01/23=October 2023.
When I open my LibreWriter merge doc and look at the data, the date has converted back to 10/01/23.
If I open the .csv in Libre Spreadsheet (or any other app), the field is October 2023.

Why is it converting back to numeric date and how do I stop it?

Thanks