Client's name change not fully/accurately rendered

I have a client who has his first credits on IMDb. He originally submitted under his legal name, since that was what his account was under, but only works under his pseudonym. The pseudonym is what he uses for scripts and contracts, and is now properly reflected on his professional page after requesting a name correction, but his credits on the feature film project still shows his legal name in this form "Professional Name (as Legal Name)", again, which he has never worked under. I understand IMDb lists names as they appear in credits, but as this project is in pre-production and there have been no screen credits created yet, and when there are they will reflect his Pseudonym, he would like to have the "as Legal Name" portion removed. His scripts and contracts are all signed under his pseudonym and I can provide copies of these if needed. Thank you, this community has been fantastic anytime I have needed you all! Much appreciated.