Upgrade sensors to 2.1.0 incompatible with 2.0 gateway?

[Michiel van der Wulp]

The upgrade to 2.1.0 "should be fully backward compatible with your controller".
My tests make me presume that updating sensor nodes to 2.1.0 without updating the gateway is not possible. Is that correct?

Maybe this is a problem (my sensors use no signing)?
https://github.com/mysensors/MySensors/pull/745/commits/ed75b16ea2d972b544e9719304d15f6ac1d18851

[Boots33]

@Michiel-van-der-Wulp I am using 2.1 nodes with my 2.0 gateway. Seems to work ok, although in this post it is recommended to update the gateway as well.