Add all the options beforehand as possible value of your Enum column, or
make the column a Ref to a table listing the different options, so that you can edit the relevant row in that table before choosing it the form where your Enum column exists.
But it is not possible to edit the options from the form.
Anyway, I don’t understand the language but it seems that your options are a combination of several components, for example a time range, some numbers, items, etc.
What you can do is to replace this column by several other enum columns, for example letting the user choose the time range, the number, the item, etc. and the result would be the automatic combination of these choices. In this way you can have any number of combinations without having to rewrite or edit.
The values that you see are coming from the database. Open your database and manually edit the value. The values on the form are automatically updated.