https://github.com/ton-blockchain/ton/compare/master...testnet#diff-6702b381f2b0dad2bef6da68f973e41b543093c597a177878802f14565f333df
Constructor
workchain_v2#a7 got additional field: persistent_state_split_depth:(## 8) (it controls how node store persistent states). Previously this constructor wasn't used nor in mainnet, nor in testnet, but we plan to switch quite soon.