Could possible be.
Perhaps I made an error at lucky pool setup.
Thats result:
"txid": "b462635eea82b6c93a3b768f348cda70d220e4f85298e60bcbe905f5ff0f4eb3",
"vout": 106,
"address": "39hpjGK9g7UZDDAAd368fET2SBEEZvkeYH",
"account": "Mining",
"redeemScript": "00141ed48789b8aa52c3daeda47af4135d7dfa67dea7",
"scriptPubKey": "a91457e813db3ab783698223b0173189cb29843ed91087",
"amount": 0.00089969,
"confirmations": 962,
"spendable": true,
"solvable": true,
"safe": true
But why the core know that mining is mining ?!
It's just a label... Somebody funded an address generated by your wallet (39hpjGK9g7UZDDAAd368fET2SBEEZvkeYH) with output 106 of transaction b462635eea82b6c93a3b768f348cda70d220e4f85298e60bcbe905f5ff0f4eb3 about 962 blocks ago.
Your wallet parsed the block that included this transaction, found an unspent output funding one of the addresses it was monitoring, looked in his database, and found that you attached a label called "mining" to address "39hpjGK9g7UZDDAAd368fET2SBEEZvkeYH". There's nothing more to it