I’m sorry if my title isn’t very evocative, it is difficult to sum up. I’ll describe my problem directly to avoid confusing theory.
Through a Gutemberg custom block, I made a dynamic table editor using a repeater field, which rows have three fields corresponding to the three columns of the table.
Among those three field there’s one which is a “file” field.
I wonder if it is possible to replace it by a “group” field, and put this file field into this group, without losing the data that have already been written in pages containing this block for this file field ?
So I mean, merge or move the data of the file field to a group field->file field.
Currently if I do that even by keeping the same field name, it won’t show the files anymore, cause the structure is changed.