Minimum Salary in Job Board Manager

Hello,
For the job info section of the posting, for a salary range of an entry-level role, the per-hour salary is around 10-25 GBP per hour...

but the system has a minimum is set to 5000... 5000 minimum is good for a fixed salary of a permanent job, but for part-time, flexible, work from home type jobs, the hourly rate is a good indicator.. but for that option, the minimum salary range should be kept at national hourly wage rate level. Can you please help...