Set autocommit periods for SnapLock volumes before reverting
To revert from ONTAP 9, the value of the autocommit period for SnapLock volumes must be set in hours, not days. Before attempting to revert, you must check the autocommit value for your SnapLock volumes and modify it from days to hours, if necessary.
Verify that there are SnapLock volumes in the cluster that have unsupported autocommit periods:
volume snaplock show -autocommit-period *days
Modify the unsupported autocommit periods to hours:
volume snaplock modify -vserver vserver_name -volume volume_name -autocommit-period value hours