IMP : Openpyxl by default making all the cells protected for a protected worksheet while reading an existing worksheet

[Mtushar22]

Steps to replicate :

1. Create a workbook with a protected sheet .
2. Make only certain cells of the worksheet protected .
3. Load this worksheet using openpyxl load_workbook .
4. Write data to the protected sheet and save it as a new file .
5. Once you open the new file , in the protected sheet you will observe all cells have now become protected and you can't edit the cells which were unprotected earlier