I'm receiving this diag for the first time.  I'm filing a partnership return with an out of state return (Oklahoma).  Taxpayer is in Illinois.  

anyone know how to clear this or why i'm getting this diag?

You can attach as a PDF the Oklahoma copy of the 8825 if you want. 

This is a diagnostic that can be struck through but not completely eliminated, no matter what you do. It doesn't interfere with anything.

I attached the a copy of the Oklahoma 8825 there was a specific description in the drop down box. I was able to file. Thanks for the input.