Finding duplicates in a column with multiple product #'s

Hi,

Is there a way to find duplicates when a column may contain multiple product numbers which are comma separated? I was able to get the below formula to flag red when only one event number is duplicated in a one to one ratio, and also have the formula disregard blanks. Any ideas if there is a way to find duplicates when your data is comma separated?

=IF([Event #]1 = 0, 0, IF(COUNTIF([Event #]:[Event #], [Event #1) > 1, 1))

Example of the data

EVENT #

Event001

Event001, Event003

Event002

Event003, Event 001

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Comments

Paul Newcome

You would want to replace the criteria portion of your COUNTIF with a FIND function.

COUNTIFS([Event #]:[Event #], FIND([Event #]1, @cell) > 0)

Jamie Null

You are a lifesaver! Thanks Paul!!

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