Unclear The finding does not say when, or whether, the old file is now cleaned up.
What
When Claude Code updates itself, the old program file is moved aside to a new location, and it is no longer deleted straight away.
Why
In practice the previous program file stays on disk for a while after an update instead of being removed at once.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
The finding does not say when, or whether, the old file is now cleaned up.