warning while defining lookup to get single value from a list in workflow

Question

While assigning value from another list to workflow variable with filter I get an error saying

"The lookup that you defined is not guaranteed to return a single value. If more than one value is returned, only the first value will be used".

On click of Ok button I get this error.

How do I get date from holiday list which is same as current date?

Answer 1

It is a warning

If this is your List, and today = 9-6-2017

Your Workflow Lookup will return paul but NOT ringo