A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi @Sanju Muraleedharan , Welcome in Community
This is happening because your data is formatted as an official "Excel Table," which triggers a feature called Calculated Columns.
Follow these step do disable it:
1.Open Excel Options:
Click File in the top ribbon, then select Options at the very bottom left.
2.Navigate to Proofing:
Select Proofing from the left-hand menu.
3.Open AutoCorrect Options:
Click the button labeled AutoCorrect Options... on the right side.
4.Disable Calculated Columns:
Go to the AutoFormat As You Type tab. Uncheck the box that says Fill formulas in tables to create calculated columns.
Click OK twice and let me know how it goes
Elvis