Trying to eliminate weird white borders

[KMS-CTE]

Good afternoon-I am not having any success in trying to eliminate the strange white border that has suddenly shown up on my spreadsheet. Hoping there is a quick explanation/fix for this?  Pls see attached: 

[#2]

@KMS-CTE 

It's an outline. On the data tab of the ribbon, in the Outline group, click Ungroup > Clear Outline.

[#3 · Accepted solution]

You'll have to remove Row Grouping and Column Grouping in order to remove those so-called "white borders".

To do so, simply click on DATA in your Ribbon, go to the "Outline" field and click the drop-down menu "Ungroup", and then, "Clear outline".

This should clear all grouping of your spreadsheet. It will also clear the white borders.

[#4]

THIS WORKED! Thank you!!! :o)
We knew it had to be something simple but had no idea how!
Thx again!