eg. if composite_20180201 is built with image from 20180201 and 20180131. When the composite is updated to composite_20180202, then the generated date layer has only two values: 20180202 and 20180201, the date 20180131 from the previous composite will be lost.
eg. if composite_20180201 is built with image from 20180201 and 20180131. When the composite is updated to composite_20180202, then the generated date layer has only two values: 20180202 and 20180201, the date 20180131 from the previous composite will be lost.