File get corrupted after copying data, contains scatter chart

Issue #890 duplicate
created an issue

Hi there,

I am trying to write a simple piece of code which copy the data from CSV to XLSX file.

XLSX file have scatter chart already present, which will use new data from CSV. My code does copy the data but corrupt the graph some how. If I plot line chart this code work fine but if I use scatter chart than it corrupt the file.

I have attached py script, xlsx file and csv file for details. Using openpyxl version 2.5 on python 3.6

Thanks, Vir