How multiple MasterNodes can run on one wallet in Windows?

I am trying for hours but I get only one MN to run.

Can one please write what to do and how to make the configuration in "aspect.conf and masternode.conf"?

I always get the same error for my FIRST masternode "could not allocate vin for collateralAddress.

aspect.conf looks so:
rpcallowip=127.0.0.1
rpcuser=a
rpcpassword=b
staking=1
server=1
listen=1
port=REPLACEMEWITHYOURPORT
masternode=1
masternodeaddr=XXX.XXX.XXX.XXX:46550
masternodeprivkey=xxxxxxxxxxxxxxxxxxxxxxxxxxxx (from MN1)
masternodeaddr=XXX.XXX.XXX.XXX:46552
masternodeprivkey=xxxxxxxxxxxxxxxxxxxxxxxxxxxx (from MN2)



masternode.conf looks so:

mn1 COLLATERALADDRESS1 IP:46550 MASTERNODEPRIVKEY1 TRANSACTIONID1 0
mn2 COLLATERALADDRESS2 IP:46552 MASTERNODEPRIVKEY2 TRANSACTIONID2 0