Unable to change Architecture or Soc once first make has been done

[mostorer]

Installed a fresh copy of Sming (MacOS), then after the installation of ESP-IDF I checked the full functionality compiling the Basic_Blink example project for SMING_SOC=esp32s3.
The build process was fine as expected but, trying to rebuild the same example with SMING_SOC=esp32 or SMING_ARCH=Esp8266 (to completely switch architecture) is not working, giving me the following error:

*** Project doesn't support esp8266: run make list-soc to see supported devices. Stop.

And this is the make list-soc output:

Basic_Blink: Invoking 'list-soc' for Esp8266 (debug) architecture
Available SoCs: esp32 esp32c2 esp32c3 esp32s2 esp32s3 esp8266 host rp2040
Project support:

• NO: esp32
• NO: esp32c2
• NO: esp32c3
• NO: esp32s2
  Using configuration 'standard'
• YES: esp32s3
• NO: esp8266
• NO: host

Tried to clean the situation with make clean and make config-clean does not change anything, and the output of make list-soc is always the same.
It seems there is no way to switch from an architecture (or also simply a soc) on the same project ... is set in stone.

Am I missing something ?

[mostorer]

It seems at the end I have the "arch" set within a custom HW configuration.