mysql – Delete all duplicated entries where multiple columns duplicates match

I need to add this contrain to my table called ‘kraken’

ALTER TABLE kraken ADD UNIQUE unique_index(exchange_pair,timestamp);

this shows me that i have duplicated entries on those 2 columns (exchange_pair and timestamp)
so first i have to delete all the duplicated entries based on those 2 columns

this is what i found but im not sure if my query would work since i need to delete only duplicated entris with column ‘exchange_pair’ and ‘timestamp’, i dont want to mess things up with my table