169900 is a model that implements a sure characteristic required for upgrading older wallets to assist break up HD chains (launched in model 139900). It exists as a result of the improve mechanism required a brand new model for this mandatory characteristic to be applied.
The characteristic added is a pre-HD break up keypool. This permits customers who improve from previous to HD chain break up to nonetheless use their pre-split keypool. The model quantity needed to be incremented with a purpose to enable the improve to work – it isn’t potential to improve a pre-HD break up pockets to 139900, the improve should be to 169900.
New wallets use 169900 as their model quantity as a result of it occurs to be highest model quantity.