There are situations where a segment repeats more than once in a loop. However if the segment has elements with more than one accepted values we want only one usage of each accepted value.
For example, a CRC segment’s third element may have 8 accepted values in a 5010 837 Professional Implementation guide. However when we use the segment more than once, we want unique values for the third element. In this scenario we select the Unique Value On Repeat column for that element.