PARTIAL SAVE: writes ONLY the 'Currency' field of TitlePublicConfigurationModel; all other v1/v2 fields stay untouched. Currency catalogue: VirtualCurrencies (Gold, Gems, Energy, etc.) AND CryptoCurrencies (on-chain tokens). Defines IDs, economy (USD value, balance limits), recharge rules for energy-like currencies, conversion rules, and per-currency permissions. The CurrencyID of each entry is referenced by Item prices, Store SKUs, Reward payouts, Quest rewards, Lootbox loot, etc. NOTE: the "Main" CryptoCurrency entry is protected and cannot be overwritten — your changes to that key will be silently ignored.