Yeah seems a change was made in firmware version 4.0.0 - March 17, 2021 which changed the way RNG was generated and wallets generated before that should be fine, not sure I’d want to risk it and wait until the full report from coinkite comes out though

https://engineering.block.xyz/blog/predictable-rng-fallback-and-32-bit-reseed-in-coldcard-firmware

https://github.com/Coldcard/firmware/blob/master/releases/History-Mk3.md