Submission Was Declined

If it was for someone else, the credit wouldn't be on his page. He's trying to change info on his own profile. Editing the name probably won't work, and wouldn't remove it from his credits anyway.

Suggesting he go searching for a mysterious film crew member, so he can change his own profile, is just silly.

@StayWilde​ I'm going to have to disagree with you there.

The OP has the username "SYoung1960". Maybe that's just a completely made-up pseudonym. On the other hand, it might reflect his actual name, with the first initial S and the surname Young. If his name were Sam Young or Scott Young or Steve Young, for example, there are dozens of people listed in IMDb with each of those names that someone might have confused him with.  Whoever submitted the credits to IMDb for that particular movie -- and it might have been someone who was just a movie fan, not someone involved in the production -- might have assigned the credit to the OP by mistake.

Even if the OP can't figure out which of the other people with the same name this credit belongs to, he can still submit a correction to have it assigned to a person with a new roman numeral (i.e. the next roman numeral not yet assigned for his name), with an explanation including a statement something like this: "This credit belongs to someone else named Sam Young, but not me, and I have not been able to figure out which of the many other people named Sam Young it belongs to."