Old value after failed validation

$('#patient').select2({
                        minimumInputLength: 3,
                        ajax: {
                            url: '{{ route("api.patients.search") }}',
                            dataType: 'json',
                            method:'GET',
                            processResults: function (data) {
                                // console.log(data); // Log the data to the console
                                return {
                                    results: data.results.map(function(patient) {
                                        return {
                                            id: patient.id,
                                            text: patient.text + " - " + patient.name,
                                        };
                                    })
                                };
                            }
                        },
                    });