This tag is used to reference MCUboot version which has been used to fix error with circular dependency between MCUboot and Zephyr. The Zephyr fork of MCUboot follows history of mcu-tools/mcuboot upstream, which allows easily switches between Zephyr and upstream forks, unfortunately the fix mentioned above have broken that, as it could not be first brought to the mcu-tools/mcuboot and then synchronized down to Zephyr fork. The Zephyr PR for the issue is here: https://github.com/zephyrproject-rtos/zephyr/pull/59855 and Zephyr/MCUboot for fix has been posted here: https://github.com/zephyrproject-rtos/mcuboot/pull/106 Since the upstream MCUboot is already fixed by this commit: 11ecbf639d826c084973beed709a63d51d9b684e the Zephyr fork will be again reset to follow the upstream, which unfortunately requires history reset. This tag has been created to keep copy of the history prior to reset.