[28/46] Extracting acme.sh-3.0.6_1: ..... done
[: !-f: unexpected operator
[29/46] Upgrading ntp from 4.2.8p17 to 4.2.8p17_1...
[29/46] Extracting ntp-4.2.8p17_1: ....... done
Could be just a transient issue due to the ongoing upgrade, if everything works as expected post-restart there's nothing to worry about