How to use the connector to load data into a table with an auto-incrementing primary key?

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I try to use flink-connector-starrocks 1.2.10_flink-1.15 to load data into a primary key table with an auto-increment id defined, as shown below. However, I don't know how to make the auto-increment id work: If I don't assign a value to this field, I get the error NULL value in auto increment column 'FID'. On the contrary, if I assign any value to this field, it will actually write the value I assigned instead of using an auto-increment value to fill the id.

TableSchema schema = TableSchema.builder()
        .field("id", DataTypes.INT().notNull()) // id is defined as an auto-increment field in the table
        .field("name", DataTypes.STRING())
        .field("score", DataTypes.INT())
        .primaryKey("id")
        .build();

RowDataTransformer transformer = new RowDataTransformer();
SinkFunction<RowData> starRockSink = StarRocksSink.sink(schema, options, transformer);
source.addSink(starRockSink);

// ......

private static class RowDataTransformer implements StarRocksSinkRowBuilder<RowData> {


    @Override
    public void accept(Object[] internalRow, RowData rowData) {
        internalRow[0] = 0;  // if I delete this line,I get the error 'NULL value in auto increment column 'FID',On the contrary, the id will be all 0.I don't know how to get an auto increment id
        internalRow[1] = rowData.name;
        internalRow[2] = rowData.score;
        internalRow[internalRow.length - 1] = StarRocksSinkOP.UPSERT.ordinal();
    }
}