Caution
If you upgrade a node from v1.2.0 to v1.2.1 after the bottlenose enactment, you will need to do a full re-sync.
This is a mandatory hotfix to the v1.2.0 release, which resolves a compatibility issue between Core API and ledger database from previous Node versions.
If you've already signalled readiness for the bottlenose protocol update, you don't need to do so again.
For Gateway runners, please make sure you update your Gateway to v1.6.1, https://github.com/radixdlt/babylon-gateway/releases/tag/v1.6.1.
Change log can be found at https://github.com/radixdlt/babylon-node/releases/tag/v1.2.0.3.