it partly solved this problem, now I can install programs again, but I still can’t upgrage and another error message appears:
error: unable to end the transaction (conflicting files)
linux-firmware-nvidia: /usr/lib/firmware/nvidia/ad103 exists in the filesystem
linux-firmware-nvidia: /usr/lib/firmware/nvidia/ad104 exists in the filesystem
linux-firmware-nvidia: /usr/lib/firmware/nvidia/ad106 exists in the filesystem
linux-firmware-nvidia: /usr/lib/firmware/nvidia/ad107 exists in the filesystem
Errors had appeared, package hadn't upgraded.