I might have made a big mistake here. 
Migrated ZHA coordinator from Sonoff E to SLZB-06M, that all worked well. Then I flashed the old Sonoff to a router firmware and added it to ZHA.
But because it kept the same IEEE, ZHA now thinks it’s also a coordinator. Things are working even when it’s plugged it, but it doesn’t seem like it’s routing properly. I also can’t seem to be able to remove it from ZHA, as it thinks it’s the coordinator.
Not sure what to do. Ideally I would like to keep my network, somehow remove the Sonoff, then somehow change its IEEE (I found some guides for the Sonoff P CC2652P one, but I got the EFR32MG21 one, so not sure how to do this), and re-add it as router.
Any suggestions on how to salvage this situation? Thanks. 