Incorrect batchMode Settings

// conn is a created connection object. The URL parameters for creating the connection contain batchMode=on&reWriteBatchedInserts=true.
// Bind parameters in batches and then execute the statement. The number of bound parameters does not match the number of columns in the rewritten INSERT statement. As a result, an exception is reported.
// java.sql.BatchUpdateException: bind message supplies 3 parameters, but prepared statement "" requires 6
PreparedStatement stmt = conn.prepareStatement("insert into test_tbl values (?, ?, ?)");

stmt.setInt(1, 1);
stmt.setString(2, "aaa");
stmt.setString(3, "bbbb");
stmt.addBatch();

stmt.setInt(1, 1);
stmt.setString(2, "aaa");
stmt.setString(3, "bbbb");
stmt.addBatch();

stmt.setInt(1, 1);
stmt.setString(2, "aaa");
stmt.setString(3, "bbbb");
stmt.addBatch();

stmt.executeBatch();