It is not necessary that the validator would work when this field is empty

[Razmik Mikayelyan]

this validator compares the values of 2 custom fields and allows you to create a task only if the two values in the field are not more than 8 hours, the problem is that these fields are not required to be filled in and I can make this validator work only in that case when these fields are filled, what needs to be added in the field indicated in the photo so that the validator does not work if the field value is empty

[rachel_bollinger]

Have you tried to simply set a default value of 0 for both numeric fields?  At least that way, they would always have a value, allowing the validation condition to be processed.