the expression inside th:field gives Neither BindingResult nor plain target object for bean name error

I am trying to create table that can be saved as a form and I am Neither BindingResult nor plain target object for bean name 'rows[0]' available as request attribute. I can see the problem is from rows used inside th:field but can figure out how to fix it

Below is the code sample

//Entity class
public class TimeTable {
        @Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	protected Integer id;

	String day;
	
	@Column(name="start_time")
	String startTime;
	
	@Column(name = "end_time")
	String endTime;

}

//controller class
	@GetMapping("/timetable/new")
	public String newTimetable(Model model) {
		
		List<TimeTable> rows = new ArrayList<>();
		rows.add(new TimeTable("Monday", "", ""));
		rows.add(new TimeTable("Tuesday", "", ""));
		rows.add(new TimeTable("Wednesday", "", ""));
		rows.add(new TimeTable("Thusday", "", ""));
		rows.add(new TimeTable("Friday", "", ""));
		rows.add(new TimeTable("Saturday", "", ""));
		rows.add(new TimeTable("Sunday", "", ""));
		
		//model.addAttribute("timetableObject", new TimeTable());
		model.addAttribute("rows", rows);
		
		return "timetable/timetable_new";
	}

<form th:action="@{/timetable/save}" method="post" >
				<table class="table table-striped table-hover table-responsive-sm align-middle" id="tableRefresh">
					<thead class=" text-center">
						<tr>
							<th scope="col">Day</th>
							<th scope="col">Start Time</th>
							<th scope="col">End Time</th>
						</tr>
					</thead>
					<tbody>
							<tr th:each="row, rowStat : ${rows}">
								<td>[[${row.day}]]</td>
								<td>
									<input type="text" name="startTime"  th:field="*{rows[__${rowStat.index}__].startTime}" class="form-control">
								</td>
							</tr>
					</tbody>
				</table>
			<button type="submit" class="form-control btn btn-outline-success">Save</button>
			</form>

picture of what I am trying to achieve

generated error

Caused by: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'rows[0]' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:153)
at org.springframework.web.servlet.support.RequestContext.getBindStatus(RequestContext.java:926)
at org.thymeleaf.spring6.context.webmvc.SpringWebMvcThymeleafRequestContext.getBindStatus(SpringWebMvcThymeleafRequestContext.java:232)
at org.thymeleaf.spring6.util.FieldUtils.getBindStatusFromParsedExpression(FieldUtils.java:306)
at org.thymeleaf.spring6.util.FieldUtils.getBindStatus(FieldUtils.java:253)
at org.thymeleaf.spring6.util.FieldUtils.getBindStatus(FieldUtils.java:227)
at org.thymeleaf.spring6.processor.AbstractSpringFieldTagProcessor.doProcess(AbstractSpringFieldTagProcessor.java:174)
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74)
... 116 more

If you're using th:field, then you need to add a model attribute to your model and set it as the th:object of your <form />. Since you are using a variable named rows, your th:object should look like this:

public class TimeTableForm {
    private List<TimeTable> rows;

    public void setRows(List<TimeTable> rows) {
        this.rows = rows;
    }

    public List<TimeTable> getRows() {
        return rows;
    }
}

it must be added to your model in your controller:

TimeTableForm form = new TimeTableForm();
form.setRows(rows);
model.addAttribute("timeTableForm", timeTableForm);

and your form must be updated to reflect the new object:

<form th:action="@{/timetable/save}" th:object="timeTableForm" method="post">