Take a look at https://github.com/code-423n4/2024-03-zksync/blob/4f0ba34f34a864c354c7e8c47643ed8f4a250e13/code/contracts/ethereum/contracts/upgrades/BaseZkSyncUpgradeGenesis.sol#L20-L42
Considering the only change between this and the non-Genesis BaseZkSyncUpgrade is the fact that the protocol version is allowed to be set to the current one, i.e //Genesis Upgrade difference: Note this is the only thing change > to >= _newProtocolVersion >= previousProtocolVersion, "New protocol version is not greater than the current one", i.e then to be in alliance with Config.sol of allowing 100 as a delta, then the difference needs to be dropped by 1, since the lower end of the possible values has been reduced to accept previousProtocolVersion.
Non-critical, just to be more in allignment with the Config.sol
Consider reimplementing the logic for the genesis upgrade.
