Cannot add a new column

[Mackie]

I clicked "New Column" button but Power BI desktop shows an error dialog saying the next sentence immediately.

Error Message:
Failed to save modifications to the server. Error returned: 'The Column with the name of 'Column' already exists in the 'TestTable' Table.

How do I add a new column?

[Shahfaisal]

The issue is with the name you provided for the new column as there is already an existing column with that exact name in the table. Please choose a different name for the new column.

[mounikareddy]

i think you should Rename the column to proceed.

[Mackie]

But Power BI does not give a enough time to change column name.

It immediately shows the error dialog right after I clicked the "New column" button.

[Mackie · Accepted solution]

To avoid this error, I deleted the entire table and recreated a new table.