Connect one Node from one AWS instance to another Node which is in other AWS instance

Question

I am running a private network. Four nodes are running in one AWS instance. Ledgers are keeping in s3 bucket. Now from another AWS instance I trying to connect one node with those four nodes. Below is my configuration of that node who is going to connect with them.

HTTP_PORT=11634

PEER_PORT=11633

PUBLIC_HTTP_PORT=true

FAILURE_SAFETY=0

NODE_SEED="SAX6QBGJPUOTUDLN3LBREJW4573RHOBA2DBTFLT7SKDFHVHXKNHYQTXU"

NODE_IS_VALIDATOR=true

UNSAFE_QUORUM=false

NETWORK_PASSPHRASE="DIAM MainNet"

DATABASE="postgresql://dbname=diamdb5 user=core5 password=XXXX host=localhost"

[[HOME_DOMAINS]]
HOME_DOMAIN="san.diamcircle.io"
QUALITY="HIGH"

[[VALIDATORS]]
NAME="diam_1"
HOME_DOMAIN="san.diamcircle.io"
PUBLIC_KEY="GBMDAYG7MMDR5V2KZJ3JJHGO7OZIVAEEP2RTQBNTJIPSNZIIMEJTM2FF"
HISTORY="curl https://diamantemainnet.s3.us-west-1.amazonaws.com/Node1/{0} -o {1}"

[[VALIDATORS]]
NAME="diam_2"
HOME_DOMAIN="san.diamcircle.io"
PUBLIC_KEY="GCWYCQBCJYVYAW2JBB6V6SV55OPGQD63TKI37WOSCD7JEVDDSPFXA3OT"
HISTORY="curl https://diamantemainnet.s3.us-west-1.amazonaws.com/Node2/{0} -o {1}"


[[VALIDATORS]]
NAME="diam_3"
HOME_DOMAIN="san.diamcircle.io"
PUBLIC_KEY="GALKWDD5P2ZE6YLYGG73FMRZ2BW6PCJ4WS665GDUMMNIA6ANCR32CWRW"
HISTORY="curl https://diamantemainnet.s3.us-west-1.amazonaws.com/Node3/{0} -o {1}"

After that if I run new-db then I am getting below error

Must specify a matching HOME_DOMAINS for self [CommandLine.cpp:1523]

Anything am I left to configure?