change Jquery triggers all inputs of the same name

Question

Hello

I added an event change jQuery input field with date-Picker, for in every change already make the change in the BD. However, this input field is repeated for each user with the same name.

The code is working normally, makes the right changes and saves in the database for each user separately. However, when I look at the log I see that it fires to all registered users (even not affecting the others, only that it was modified).

$("input[name='last-day-training']").on('change', function() {
		var id = $(this).attr('alt');
		var last_day_training = $(this).val();
		var data = {'key':'last-day-training','last_day':last_day_training,'user':id};
		data = JSON.stringify(data);
			$.ajax({
				type : 'POST',
				url : 'funcoes/_planejamento.php',
				dataType : 'json',
				data : {data:data},
				success: function(data){
					console.log(data);
					if(data.sql=='ok'){
					}else{
						alert('Erro, por favor contate o administrador');
					};
				},
				error : function(XMLHttpRequest, textStatus, errorThrown) {
					console.log(XMLHttpRequest);
					console.log(textStatus);
					console.log(errorThrown);
				}
			});
	});

<input name="last-day-training" alt="<?php echo $l->id;?>" type="text" data-date-format="dd-mm-yyyy" data-date-viewmode="years" class="form-control date-picker">