Internal/External
Internal if an IOHK staff member.

Area
Other Any other topic (Delegation, Ranking, ...).

Summary
The Conway PV11 is already available with

"ExperimentalHardForksEnabled": true,
"ExperimentalProtocolsEnabled": true,

and testnet can be started in PV11, however blocks are not forged in protocol version 11.

I see this in log files

[iog42:cardano.node.ChainDB:Error:26] [2025-11-28 14:56:41.00 UTC] Invalid block a74fbf9db8824eab3de215ed607ae0a3fff370bd041b08cde4a61bb0b59114ce at slot 0: ExtValidationErrorHeader (HeaderEnvelopeError (OtherHeaderEnvelopeError (HardForkEnvelopeErrFromEra S (S (S (S (S (S (Z (WrapEnvelopeErr {unwrapEnvelopeErr = ObsoleteNode (Version 11) (Version 10)}))))))))))

Steps to reproduce
Steps to reproduce the behavior:

1. Try to run a testnet in Conway protocol version 11.
2. Run query protocol-parameters to see that the testnet is really running with protocol version 11.
3. Run query tip to see that no blocks are forged.
4. Check node log file and see the error above.

Expected behavior
Blocks are forged in protocol version 11.

System info (please complete the following information):

• OS Name: [Fedora]
• OS Version [42]
• Node version: 10.6.1 (0c220b2)
• CLI version: 10.13.1.0 (0c220b2)