Can't update a key field with a MODIFY

[sagobogger]

I need to change one field in a few records in a large .FOC table. Normally I would do that by creating a hold file with the corrected data, and then use a MODIFY to UPDATE the field in the .FOC. But this time it is an indexed field and I have run into the "A key field cannot be updated using a modify" error.

So, how can I do this?

 

[sagobogger]

The answer appears to be by using SCAN.