Sorry for the delay.
No, they are not useless but as explained in the ticket above, it happened due a transition to a new method to regenerate ALL deposits in the whole universe reliable. It just wasn’t synced with the map info.
Auto Miners, Watergenerators etc. have no real entity ID like structures have. We can’t restore their contents.
I can only trust you for now and restore 25 Auto Miners, if I would know if T1, T2 or T3 Auto Miners.