How to let employee submit same absence more than once in a day.

Is there any way to allow same absence more than once in a day.

Example: Employee have appointment one in the morning and one in the afternoon. Employee submitted Sick absence with partial hours from 9AM to 10AM and trying to apply Sick absence with partial hours from 2PM to 3PM, in this case system throws an error 'An Absence already exists with the same Start and/or End dates. Please modify your Start and/or End dates.'