The oldest checkpoint format this build reads into its layout. Format 4
(v4.11.0) carries every process fact the current layout requires except the
parts a later format added, and the initial state of such a part is the truth
about a process of that build. Formats before it (3, v4.10.1, and earlier)
lack facts the current layout requires that the old data cannot reconstruct;
they are refused, as is an unknown or newer format, instead of being filled
with guesses.
The oldest checkpoint format this build reads into its layout. Format
4(v4.11.0) carries every process fact the current layout requires except the parts a later format added, and the initial state of such a part is the truth about a process of that build. Formats before it (3, v4.10.1, and earlier) lack facts the current layout requires that the old data cannot reconstruct; they are refused, as is an unknown or newer format, instead of being filled with guesses.