"Inverted" screens

I have a problem for a few days. I have 2 identical screens on my PC.
At the start of the PC after identifying myself when I have the cursor of the mouse present on the screen of the left I have the launcher of the right screen that appears and vice versa. (Same if I start a program this one will appear on the second screen and the cursor of the mouse present on the other screen will act on this program).
The backgrounds are also reversed.
The screens are connected to displayport
I did not want to install the nvidia proprietary drivers
If I turn off one of the screens, then turn it back on to normal.
This phenomenon happened suddenly without installing a program. (Probably after an update)
thanks in advance