8u270 is a special contingency release which never went out. It was created to address any contingencies with TLS 1.3. Currently, presence of this backport misguides hgupdater to think this is the first public release and hence 8u271 backport is added with hgupdate-sync label. This is incorrect. (Example:
JDK-8250787). So please exclude 8u270 from hgupdater evaluation.