Unable to delate Safari history

I kinda really need help cause the Mac it's not even mine, when slick in safari (the one next to the apple on the upper part of the screen) and click "configuration" it shows you a new tab of stuff like windows, passwords, security and more, the first one is the one called "general" I don't know what I did but not the fifth option "Delete history" is turn off, and I can't delete the history of Safari.

I need help figuring out how to turn it back on, no matter what I try I can't delete the history

If anyone knows how to fix that please let me know