This is a mandatory release for mainnet and calibnet node operators. It introduces a fix upgrade for calibnet at epoch 2_558_014 which corresponds to Mon 7 Apr 23:00:00 UTC 2025 and changes the mainnet upgrade epoch for the NV25 Teep to 4_878_840 which corresponds to Mon 14 Apr 23:00:00 UTC 2025.
See here for details on the issue.
Also, see the CHANGELOG for details.