no way to remove an invalid cast credit attribute

Adding the cast member listed first in the end credits (and as a co-star in the opening credits) for A Matter of Choice (2023). Unfamiliar with your new format for doing so, I guessed at an attribute for her but it was rejected as invalid. Now, I see no way to remove the invalid attribute in order to proceed. Since she is not currently listed among the cast at all (how mysterious since her co-star is the only one of umpteen cast members listed with an order attached), I'll give you her name: Lydia Wilson (II).