I have set flash read protection --Level 1 - on chip STM32G431CBU6
Then I turn off this protection (set level 0).
But after that I see zeros (not FF) in all flash and I can't to full erase chip
Fixed the problem. The ST company is silent because the STlink utility does not normally work with the G4 series microcontrollers. It destroys the microcontroller. To solve the problem, I filled in the values as in the picture and gave an entry.