Hi tinychristine,
Business Schools generally do not care if you have more than one GMAT Score in your file. That having been said, since many Business Schools have publicly stated that they do not use an applicant's IR score when evaluating an application, there is no real 'benefit' to having that 600 on file. As such, the best move would likely be to 'cancel' it.
While a 620/Q48 is a solid Score - and it could be enough to get you into your first-choice School - that result would likely be at the lower-end of the range for most Top Programs (including UCLA). Since you have a specific Program in mind, you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. Those Experts should be able to answer your Admissions questions and help define the specific areas of your profile that could use some improvement. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/If you do choose to retest, then before I can offer you any advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied in total? How many hours do you typically study each week?
2) What study materials have you used so far? What "brands" of CATs/mocks have you used?
3) On what dates (or approximate dates) did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) What specific application deadlines are you facing?
If you took either of your Official GMATs at a Test Center, then you might also choose to purchase the Enhanced Score Report. While the ESR doesn’t provide a lot of information, there are usually a few data points that we can use to define what went wrong on Test Day (and what you should work on to score higher). If you purchase the ESR, then I'll be happy to analyze it for you.
GMAT assassins aren't born, they're made,
Rich
760+: What GMAT Assassins Do to Score at the Highest Levels