Hello
I wanted to help a new user with his question and found the page.
http://documentation.scribus.net/index.php/Tables.
There is quite at the beginning an omission, in that if one creates a new table, set up the colums and rows, the hint to degroup in all cases is not implicitly described.
If I knew how, I would have changed it, but as I do not know this, please can you tell me who would do this? I think this is an important info.
I have no clue if in older version of Scribus this degrouping was not mandatory, but since the versions 4.2.x it is.