so I can fetch the converted leads records using API (COQL), using this endpoint

and using COQL filter Converted__s=true

for some reasons I need to change the value from a field in a converted lead record.

When I try to find and click the converted lead record, I can't no longer access the lead record like this

I need to change the value from a field from the converted lead, so when I fetch using COQL API, the record will also be updated