I run a private Eth network with geth. I have two nodes on the network. I had these nodes connected over the last months. However, today when I try to connect one to the other I get an error:
err="Genesis block mismatch - 6231b02ac967dff9 (!= d4e56740f876aef8)"
When I display the hashes in geth they are also different:
> admin.nodeInfo.protocols.eth.genesis "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3"
> admin.nodeInfo.protocols.eth.genesis "0x6231b02ac967dff9b0c799e956094408959de862d720d08776302ffefba0300b"
However, it is the same file (I copied it with scp). Also when I run
it will result in the same hash for both machines. Furthermore I start the nodes with the exact same settings (apart from the directory path). Might this be related to different geth versions (1.8 on machine 2 and 1.9 on machine 1) or to a recent crash of machine 1?