I understand that blocks in a blockchain if there has been confirmations or if more number of blocks are added after it cannot be modified.
If I am the admin, will I be able to stop the nodes being added temporarily and probably delete an erronoes transaction in a node or maybe isolate the whole block and ask the sender to re-do the transaction?
how do i even modify a newly created block evenif there are no blocks added to it?
who has the control? or is it not controllable by anyone?