Fields "available_capacity_day", "available_capacity_night", "population_night","population_day" and "population" (Field already available in Eden previous versions) refer to the same thing. Field "population" define the shelter population in a static way, others define it in a dynamic way. Probably using them together doesn't make sense....

I left the previous behavior as default. I customized the EVASS config file with a customise_cr_shelter_resource method to  activate dynamic fields.