One of the information in the consolidation section in Lighthouse book is wrong. I realise this after reading https://ethereum.org/en/roadmap/pectra/maxeb/ and a further look at [EIP 7251](https://eips.ethereum.org/EIPS/eip-7251) which states:
`
Note: the system contract uses the EVM CALLER operation (Solidity: msg.sender) to get the address used in the consolidation request, i.e. the address that calls the system contract must match the 0x01 withdrawal credential recorded in the beacon state.
`
So the withdrawal credentials of both source and target validators need not be the same.
