Delete Entities

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Good morning
I am still with my Cover problem regarding roller shutters. To test, I had fun adjusting the start and end of my shutters in the ETAT section.

Capture d’écran 2023-09-20 à 15.23.51
Capture d’écran 2023-09-20 à 15.23.512120×2648 589 KB

Capture d’écran 2023-09-20 à 17.40.54
Capture d’écran 2023-09-20 à 17.40.542340×702 54.8 KB

Capture d’écran 2023-09-20 à 17.42.58
Capture d’écran 2023-09-20 à 17.42.582304×1326 467 KB

Capture d’écran 2023-09-20 à 17.55.01
Capture d’écran 2023-09-20 à 17.55.011758×1968 559 KB

So, my tests done, I would like to delete the five entities which are selected above. So I looked in the entity section but it was impossible to select them!
How can I delete them? Thanks in advance.