Way to limit or not allow user to select a specific time period in the dropdown
I have a line item Start and End that has a list of 1-5 as shown on the screenshot below. In the example below for item 1, I have selected start and end date of Jan 19- Mar 19, in item 2 I have selected Apr 19 - Jun 19. Is there a way to limit the dropdown of the second item so that it will not allow me to select a start date that is already from the duration of item 1? or if possible, a checking or indicator that will prompt me that the period I am selected is already in use?