In this case, you have two name pages or filmography pages. If you are associated with all of the titles on both pages, then a name merge is needed.
The other question that you need to answer is which name page do you want as the primary page? I'm assuming that since your recent credits are as Johnny 'Koolout' Starks, then the second name page (Johnny Starks) will be used to submit a name merge.
Instructions on how to submit the name merge are in the page link below.
IMDb Help Center Page:
How can I combine two IMDb filmography pages?When you fill out the name correction or merge form, type the name this way:
'Koolout' Starks, Johnny
Acknowledge the yellow warning message about merging name pages by clicking the checkbox to the left of the following statement:
Warning understood, go ahead anyway.
Processing can take as little as 48-72 hours, depending on any data backlogs (
Data Processing Times page).
I hope this helps. Please write back if you need assistance with the submission.