Added a '>= 1' constraint check to loss_histogram_bins in the db schema
Added a '>= 1' constraint check to loss_histogram_bins in the db schema


Former-commit-id: c72b92017066116d8bbc0365c891f56667aa302c [formerly cac9e2503410085ddee39d9b24456933167b3555]
Former-commit-id: 104c7164911cddce186956b05996bee851b7cc98
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine