Edit a SP list column unable to enter data

Hi,

I'm trying to edit some data in a column within my SP list.   The column type is Choice.   The issue is the is not a 'Choice' field.

When created it was going to be a Choice field but when I built the Powerapp that is feeding data to this column is has become a lookup field.

So in my app the user selects Division and then the wards in the division are available for selection in the Ward field. Sort(Distinct) formula used looking at another SP list

SharePoint

PowerApp

This as caused an issue as I need to edit one some values in the Division and Ward columns in SP.

Can I amend the column values to Single line of text, without losing any of the data??

If not is there away I can amend, edit the data??