Is it possible to configure to book continuous 60 calendar half days?

Summary:

Hi Team,

We need to create new absence type includes new absence plan (Qualification) but whenever user will go and apply for leaves, they can book 60 continuous calendar half days only so we tried it but advanced mode option is showing as disable though we enable it.

Content (required):

We need to create new absence type includes new absence plan (Qualification) but whenever user will go and apply for leaves, they can book 60 continuous calendar half days only so we tried it but advanced mode option is showing as disable though we enable it.

Version (include the version you are using, if applicable):