<p><strong>Yes. You can ignore this.</strong></p>

<p>This means that some miners have mined (still compatible) blocks with a version number unknown to Bitcoin Core.</p>

<p>Generally this indicates that some miners have mined blocks that signal non Bitcoin Core compatible soft- or hard-forks. Very likely a 2MB hardfork after BIP109 implemented by Bitcoin Classic.</p>

CC BY-SA 4.0
2018-08-11T00:34:15.217Z
beside ignoring it, can we do something to remove it? ..or i bet it will go away as more block are added to the chain? Got 1 of last 100 about 2 years later than your answer.. and still relevant
Louis Loudog Trottier
CC BY-SA 4.0
2019-06-25T14:58:55.610Z
"BIP109 implemented by Bitcoin Classic"

What's "Bitcoin Classic"?
Aleksandr Levchuk
CC BY-SA 3.0
2016-07-15T12:50:19.553Z
2016-07-15T12:50:19.553Z
Jonas Schnelli
<p>I replaced my bitcoind from v0.11.2 to v0.12.1. Then I found "UpdateTip: 6 of last 100 blocks have unexpected version" in debug.log. This error occurs at new block generation. Can I ignore this? If not, how can I fix it?</p>

<p>I downloaded the new bitcond from </p>

<p><a href="https://github.com/btcdrak/bitcoin/releases" rel="noreferrer">https://github.com/btcdrak/bitcoin/releases</a>
<a href="https://github.com/btcdrak/bitcoin/releases/download/v0.12.1-addrindex/bitcoin-0.12.1-addrindex-linux64.tar.gz" rel="noreferrer">https://github.com/btcdrak/bitcoin/releases/download/v0.12.1-addrindex/bitcoin-0.12.1-addrindex-linux64.tar.gz</a></p>

CC BY-SA 4.0
2019-01-03T18:30:19.317Z
I'm still getting this on bitcoin core 0.17.1 --- and YES you can just ignore it. "warning='28 of last 100 blocks have unexpected version'"
Patoshi パトシ
CC BY-SA 4.0
2019-03-09T21:02:24.493Z
I'm seeing "warning='39 of last 100 blocks have unexpected version'". Is that still OK?

At what point it's not ok?
Aleksandr Levchuk
<bitcoind>
bitcond v0.12.1. "UpdateTip: 6 of last 100 blocks have unexpected version"
zono
# bitcond v0.12.1. "UpdateTip: 6 of last 100 blocks have unexpected version"

(Asked by: username_0 on 2016-07-02)

I replaced my bitcoind from v0.11.2 to v0.12.1. Then I found "UpdateTip: 6 of last 100 blocks have unexpected version" in debug.log. This error occurs at new block generation. Can I ignore this? If not, how can I fix it?

I downloaded the new bitcond from

<https://github.com/btcdrak/bitcoin/releases>
<https://github.com/btcdrak/bitcoin/releases/download/v0.12.1-addrindex/bitcoin-0.12.1-addrindex-linux64.tar.gz>

**Tags:** bitcoind

> **Comments:**
> **username_1**: I'm still getting this on bitcoin core 0.17.1 --- and YES you can just ignore it. "warning='28 of last 100 blocks have unexpected version'"  
> **username_2**: I'm seeing "warning='39 of last 100 blocks have unexpected version'". Is that still OK?  At what point it's not ok?  

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## 1 answers

### Answer by username_3 on 2016-07-15. Score: 26 | Accepted answer

**Yes. You can ignore this.**

This means that some miners have mined (still compatible) blocks with a version number unknown to Bitcoin Core.

Generally this indicates that some miners have mined blocks that signal non Bitcoin Core compatible soft- or hard-forks. Very likely a 2MB hardfork after BIP109 implemented by Bitcoin Classic.

> **Comments:**
> **username_4**: beside ignoring it, can we do something to remove it? ..or i bet it will go away as more block are added to the chain? Got 1 of last 100 about 2 years later than your answer.. and still relevant  
> **username_2**: "BIP109 implemented by Bitcoin Classic"  What's "Bitcoin Classic"?  

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