Another message about this error: https://community.st.com/s/question/0D53W00002FbLNvSAN/stm32cubeprogrammer-page-erase-errorPS. Yes, this is a real bug: Bootloader (STM32F103) really erases wrong sectors.

Another message about this error. And no response from ST staff. https://community.st.com/s/question/0D53W00002A2S50SAF/erase-sectors-problem-frame-data-send-uart-connection-mode

I also found this error.Here are 2 examples for STM32F103 (STM32_Programmer_CLI.exe with "-vb 3")Erasing Segment <0> Address <0x08002000> Size <16>BytesErasing internal memory sector 8data sent successfully to target: 0x000808   - STM32CubeProgra...