How to reintialize genesis block in geth ethereum

Question

I initialized genesis block with wrong address. So I made changes to the genesis block and trying to initialize again but I am getting error:

geth --datadir ./data init ./custom_genesis.json

INFO [12-05|12:49:19.240] Maximum peer count                       ETH=25 LES=0 total=25

INFO [12-05|12:49:19.241] Allocated cache and file handles         database=/home/edureka/privatechain/data/geth/chaindata cache=16 handles=16

INFO [12-05|12:49:19.295] Persisted trie from memory database      nodes=1 size=150.00B time=156.955µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B

Fatal: Failed to write genesis block: database already contains an incompatible genesis block (have 9f6ec9be0aafd8b0, new 9279b016a010f22d)

Answer 1

You are getting this error because you have already initialized genesis block once and re-initializing the genesis block. To solve this error, delete the folder ./data/geth and then initialize:

rm -rf /home/user/privatechain/data/geth

geth --datadir ./data init ./custom_genesis.json 

Hope this helps!

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