"ah yes well we have a full database backup so we can do a full restore", then
"the full restore will be tough and involve downtime and has some side effects," then
"I bet we could be clever and restore only part of the data that are missing", then
doing that by hand, which hits weird errors, then
finally shipping the jury-rigged selective restore and cleaning up the last five missing pieces of data (hoping you didn't miss a sixth)
Happens every time someone practices backup/restore no matter how hard they've worked in advance. It always ends up being an application level thing to decide what data to put back from the backup image.