You will need the iode v7 updater to update to the iode 7.x update.
You can check the steps here: Updating iode to 7.1 - #3 by plamen
Once you update to 7.x, you will need to follow the instructions we shared with jdk11 in this thread, to switch back to our Brax update server, which handles OTA updates after iode 7.3