Validation fails with schema-sync for a required and unique field if column is missing from data

[pierrecamilleri]

Under the following conditions :

• A field has the "required" constraint
• A field has the "unique" constraint
• The column is missing from the data
• Data is validated with the --schema-sync option

The validation raises the following Exception :

...
line 325, in row_stream
    cell = row[field_name]
  File "/home/pierre/Documents/multi/opendatafrance/validata/validata-table/.venv/lib/python3.10/site-packages/frictionless/table/row.py", line 73, in __missing__
    return self.__process(key)
  File "/home/pierre/Documents/multi/opendatafrance/validata/validata-table/.venv/lib/python3.10/site-packages/frictionless/table/row.py", line 281, in __process
    raise KeyError(f"Row does not have a field {key}")
KeyError: 'Row does not have a field <name of field>'

No exception occurs if any of these conditions is removed.

Steps to reproduce

schema.json :

{
    "fields": [
        {
            "name": "myField",
            "constraints": {
                "required": true,
                "unique": true
            }
       }
    ]
}

data.csv :

A,B
1,2

Command :

frictionless validate --schema schema.json data.csv --schema-sync