warning: estrusItems update

model/neck_ring_estrus_warning.go

@@ -110,7 +110,8 @@ func (n NeckRingEstrusWarningSlice) ToPB(
 					break
 				}
 			}
-		} else {
+		}
+		if matingWindowPeriodKind > pasturePb.MatingWindowPeriod_Invalid {
 			found = isIPeriod(matingWindowPeriodKind, nowTime, optimumMatingStartTime, optimumMatingEndTime)
 		}