The predecessor's hash does not commit to this mark's key.
The hash the predecessor should carry.
The hash it carries.
The predecessor's hash was not made from this mark's key.
The sequence number is not the predecessor's plus one.
The sequence number expected.
The sequence number found.
The date is earlier than the predecessor's.
The predecessor's date.
This mark's date.
A mark at sequence 0 that is not a genesis mark.
A genesis mark whose key is not its chain id.
Why a mark does not follow its predecessor. The payloads are values; the renderers format them.