so I am new to Ether, and so I have setup a new node and all seems fine. now I would like to mine in my own private blockchain so I am running:

geth -datadir /home/ethchain/ -dev -unlock 0,1 -mine -rpc -rpcaddr -rpccorsdomain * -rpcport 8101

but getting:

INFO [09-11|20:45:23] Starting peer-to-peer node               instance=Geth/v1.6.5-stable-cf87713d/linux-amd64/go1.8.3
INFO [09-11|20:45:23] Allocated cache and file handles         database=/home/ethchain/geth/chaindata cache=128 handles=1024
Fatal: Error starting protocol stack: database already contains an incompatible genesis block (have a3c5c170988f516e, new e5be92145a301820)

can anyone explain why am I getting this error and how do I execute the mining now?




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