If I try to delete the security deposit. When I click on "update property" the security deposit is "filled" again. when I delete the security deposit and left it blank, it returns to the last amount after update it.
So, when I put "0" (zero) it changed. I believe that the system should understand when it is blank, it is zero.

If it is blank, it is zero or "not applied" for the property. It is not necessary an additional step to set the option to zero. If we left blank, system should understand that I don't want this option for my property.