Update Category Setup Natural Account Segment for Impairment Expense

Hello, is there a way to update the Natural Account Segment in the GL string for Impairment Expenses? We have added the GL strings for both Impairment Expense and Accumulated Impairment to existing Categories and realized that the natural account on the Impairment Expense line is incorrect and would like to update it, however unlike the other Expense related lines in the Category setup that are updateable, the Impairment Expense GL string is not so wondering how we can update it.

Thank you