RSS_IMAGE_NOT_AUTHENTIC Wireless stack update error

Hello,

I have STM32WB55 Nucleo kit (EPNWB55$CU5) from STM32WB workshop. As I know, it works only with special versions of wireless stack from workshop package.

I tried to update USB dongle BLE stack with stm32wb5x_495B_wireless_cryp_BLE_Stack_fw_v1.0.0.bin file from workshop package V2.1, but update process ended with RSS_IMAGE_NOT_AUTHENTIC error. I also tried different stack versions from workshop package and from STM32Cube_FW_WB_V1.0.0, all of them returned the same error.

How can I update wireless stack firmware, or just return to stock version?