Strange iCloud Logs in Console

I’ve discovered strange logs in Console with regard to iCloud (sensitive data replaced by “…”). While some of them surely have been around for longer and are normal, others seem suspicious:

accountsd: Account changed: …@icloud.com (…)

…

accountsd: iCloud account changed ( oldAccount: …@icloud.com (…) newAccount: …@icloud.com (…) )

…

accountsd: Validation Record for …@icloud.com needs update

…

accountsd: Remove credential key: rpassword for account: …@icloud.com (…)

accountsd: The attempt to remove item for service com.apple.account.AppleAccount.rpassword and username …@icloud.com failed.

sharingd: Request info for …@icloud.com

sharingd: AccountForAppleID found account …@icloud.com (…)

sharingd: Reusing Account-cached altDSID and gstoken for …@icloud.com

I haven’t changed anything about my account, and even though it is stated that my account had changed, the alphanumeric strings of “oldAccount” and “newAccount” following “…@icloud.com” are identical. Moreover, old devices that I separated from my Apple ID years ago—iPad Air and iPhone 6 Plus, for example—suddenly reappear in the logs.

Most importantly, though, what’s the deal with removing the credential key rpassword?