 ``` [INF] CORE: Initializing a built-in btc wallet [TRC] CORE[btc]: Fallback fees set at 100 Sats/vbyte [ERR] WEB: error creating btc wallet: error loading wallet for 0 -> btc: error opening wallet: fee rate limit is smaller than smallest unit: 2e-06 "POST http://127.0.0.3:5758/api/newwallet HTTP/1.1" from 127.0.0.1:58922 - 200 73B in 1.888988083s ``` Then when trying again with a higher limit:  `[ERR] WEB: error creating btc wallet: Error creating wallet: CreateNewWallet error: wallet already exists`