I am getting a KeyError, after file save, My goal is to after changes save file

[ervijay587]

This is my Code:

import openpyxl
from openpyxl import load_workbook

#load existing excel file from the storage
wb = load_workbook("test1.xlsx")
print(wb._active_sheet_index)

#Print sheet name you want to activate
activate_yoursheet = input("Enter your sheet name to activate:")

#List all sheetnames
for sheet in wb:
    #print(sheet.title)
    if(sheet.title == activate_yoursheet):
        break

wb.active = activate_yoursheet
print("Your activated sheet is now:", wb._active_sheet_index)

wb.save("test1.xlsx")

The Traceback I get is this:

Error:
Traceback (most recent call last):
  File "xcel.py", line 6, in <module>
    wb = load_workbook("test1.xlsx")
  File "C:\Python37\lib\site-packages\openpyxl-2.5.0-py3.7.egg\openpyxl\reader\e
xcel.py", line 177, in load_workbook
    src = archive.read(ARC_CONTENT_TYPES)
  File "C:\Python37\lib\zipfile.py", line 1428, in read
    with self.open(name, "r", pwd) as fp:
  File "C:\Python37\lib\zipfile.py", line 1467, in open
    zinfo = self.getinfo(name)
  File "C:\Python37\lib\zipfile.py", line 1395, in getinfo
    'There is no item named %r in the archive' % name)
KeyError: "There is no item named '[Content_Types].xml' in the archive"

I didn't try anything new, what I thought is it may be a problem with a type of file I am using, i.e. binary or may UTF type of file will work but I don't know how to proceed further.