A Radiance Blu-ray release I am trying to catalog includes a bonus soundtrack CD. (https://www.radiancefilms.co.uk/products/the-dead-mother-le) Is there a way to include this CD in the "Discs" information along with its Disc-ID?

I can add a stub for for the CD, but not the details of the disk, which leaves me with an incomplete record. The interface rejects it as not being a DVD disc ("There is not a DVD disc in Drive D:") even though the disc can be seen in the "Read Disk ID:" dialogue box. Or, is it better to leave off any reference to the CD in the "Discs" section?

That seems to work, though it sends up a flag on the Title record for "Improvable: Disc Chapters/Episodes", even with the "Bonus Disc: Contains only bonus features" and "Digital Copy: Is a digital copy" checkboxes checked for the disc. The Blu-ray disc has the "Chapters" completed ("Chapter names not included" is checked), so the Title record was not throwing this flag previously. Is there any way to eliminate the flag on the Title due to this CD disc being added?