Какая ошибка в коде?

list_a = [1, 8, 3, 4, 5]
 
for l in list_a:
    if list_a[list_a.index(l)+1] > l:
        p = list_a[list_a.index(l)+1]
        q = l
        list_a[list_a.index(l)] = p
        list_a[list_a.index(l)+1] = q
 
print(list_a)

Traceback (most recent call last):
  File "C:/Users/plays/OneDrive/Рабочий стол/Python/vh.py", line 7, in <module>
    list_a[list_a.index(l)+1] = q
ValueError: 1 is not in list

list_a = [1, 8, 3, 4, 5]
is_change = True
 
while is_change:
    is_change = False
    for i in range(len(list_a) - 1):
        if list_a[i] > list_a[i + 1]:
            list_a[i], list_a[i + 1] = list_a[i + 1], list_a[i]
            is_change = True
 
print(list_a)

def insertion_sort(alist):
    for i in range(1, len(alist)):
        temp = alist[i]
        j = i - 1
        while j >= 0 and temp < alist[j]:
            alist[j + 1] = alist[j]
            j = j - 1
        alist[j + 1] = temp
 
 
if __name__ == '__main__':
    alist = input('Enter the list of numbers: ').split()
    alist = [int(x) for x in alist]
    insertion_sort(alist)
    print('Sorted list: ', end='')
    print(alist)