Fixes#6469
Using `uuid/parse` caused a crash when "Relative to" field was set to "auto",
producing an empty string. This change uses `uuid/parse*` instead, which safely
returns nil for invalid or empty inputs, preventing the crash.
Signed-off-by: Dmitriy Mikheev <mirakernel.disroot.org>
Co-authored-by: kira <kira@kira.kira>