I can't transfer coins from masternode.

./snowgem-cli getbalance
2270.06346233

./snowgem-cli sendtoaddress XXXXXXXXXXXXXXXXXXXXXXXXX 10
error code: -4
error message:
Insufficient funds, coinbase funds can only be spent after they have been sent to a zaddr Insufficient funds.

./snowgem-cli listunspent
227 records like this
 {
    "txid": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
    "vout": 2,
    "generated": true,
    "address": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
    "account": "",
    "scriptPubKey": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
    "amount": 10.00000000,
    "confirmations": 79959,
    "spendable": true
  }