Yokohama Issue - Negative hour Time card update possible from Time sheet portal form view but blocked while adding negative hours to the time card from time sheet Portal Issue After upgrade to Yokohama , Negative hour Time card update is possible from Time sheet portal form view but blocked when adding negative hours to the time card from time sheet Portal .FactsHaving the ability to enter negative hours is there for a very good reason - to correct any previous entry mistake. The behaviour of allowing to add negative hours is there from the beginning and is indeed the design behaviour . If customer doesn't want to allow negative hours addition to a time card they can write a business rule to block its addition but that should be owned and maintained by the customer and is indeed a customisation.ReleaseYokohamaCauseThis is a defect :PRB1896237ResolutionWe have raised a defect :PRB1896237 for this Issue where the negative hours are blocked from the portal view where as it is allowed in the form view . The design behaviour is to allow adding negative hours to the time card and hence blocking it is a defect which would be fixed by our development team.