Migrating 190 devices to a new key?

Hello,

I currently have a little over 190 Zigbee devices spread across 2 networks. About 50 Legrand on a Conbee 2 key and the rest on a Sonoff P. I set up 2 networks because my Sonoffs regularly disconnected when they were on the same network as my other devices (especially Hue bulbs and door openers, motion sensors, etc. Aqara)
I regularly have stability issues and I’m thinking about changing the key. It would probably take me a good day to re-pair everything, but that’s no problem for me if I can put everything on the same network and if I can gain stability. I’m considering switching to a Sonoff E key for this.
I’ll be interested in your opinions before starting a migration.

Thanks!

When re-pairing all your devices do all the router devices first. Then the end devices.