When a tenancy is being renewed it may be the case that a higher rent has been agreed, to reflect this in Solo/Origin, renew the tenancy as detailed in Renew a Tenancy.
Once you have renewed the tenancy you will need to edit the rent to reflect the new value. Click on the pencil edit icon to open up the renewed tenancy to edit.
Within the Tenancy Details section edit the rental value by clicking on the pencil icon and then adjust the rent and tenant component to the newly agreed rental value and click update. Close the edit box, and then at the bottom of the page click on Update Tenancy to save these changes.