Fullcalendar triggering multiple sources - fullcalendar

Question

I'm using fullcalendar v2 and the sources of the events are selectable from an ul-li menu. The initial call uses the link from the first li and I may navigate through all the months in the calendar. When I use the second link, fullcalendar retrieves the events from the previous link as well as the new link. On each new select, fullcalendar remember the event sources. How can I disable this? Here my code:
$("#chgBranch li").on("click", function (event) {
event.preventDefault(); // To prevent following the link (optional)
var urlEvents = $(this).children('a').attr('href');
var branchName = $(this).children('a').text();
$('#calendarSchedules').fullCalendar('removeEvents');
$('#calendarSchedules').fullCalendar('removeEventSource');
// refill calendar
fillEvents(urlEvents, branchName);
});
function fillEvents(urlEvents, branchName) {
// change title of potlet box
var newTitle = '<i class="fa fa-calendar"></i> Available schedules for: ' + branchName;
$('#calendarCaption').html(newTitle);
$('#calendarSchedules').fullCalendar({
year: <?= $yy ?>,
month: <?= --$mm ?>, // javascript month is 0 based
date: 1,
header: {
left: '',
center: 'title',
right: 'prev,next,today'
},
defaultView: 'month',
firstDay: 1, // monday
editable: false,
slotEventOverlap: false,
selectable: true,
selectHelper: true,
dayRender: function (view, element) {
$('.fc td.fc-sun').css('background', '#E7EFEF');
$('.fc td.fc-sat').css('background', '#E7EFEF');
},
eventClick: function (event) {
$('#dueTime').show();
$('#duedate').val(moment(event.start).format('YYYY-MM-DD'));
$('#duetime').val(moment(event.start).format('HH:mm:ss'));
$('#isPartitionable').val(event.partitionable); // user clicked on partitionable dispo or not
}
});
$('#calendarSchedules').fullCalendar('addEventSource', urlEvents);
}
// load first branch item
$('#chgBranch li a:first').trigger('click');

Answer 1

I think you should destroy your calendar also. Because you are initializing fullcalendar every tine on sources change from ul-li.
Try below one.
$("#chgBranch li").on("click", function (event) {
event.preventDefault(); // To prevent following the link (optional)
var urlEvents = $(this).children('a').attr('href');
var branchName = $(this).children('a').text();
$('#calendarCaption').fullCalendar( 'destroy' );
// refill calendar
fillEvents(urlEvents, branchName);
});
This will work for sure. I tried locally and works fine.

Answer 2

I tried it with following method which also works fine, but #Chintan method is also fine:
$('#calendarSchedules').fullCalendar('removeEvents');
$('#calendarSchedules').fullCalendar('removeEventSource', storedEventSource);
And I store the event source in a hidden field once the calendar rendered.