Upgrade from SLES12 sp5 to SLES15sp2 fails installation setting page


when upgrading to SLES15 sp2 I recivce a error message in “Installation setting >> Update options” stating “Some products are marked for automatic removal, contact the vendor …”
The product that is marked for automatic removal is SLES12 sp5 which for me seems reasonable.
I cant figure out how to resolve this, I have no modules active in SLES12. No extra repository’s etc.
Any one seen and solved this before?

Why not contact the vendor SuSE?
Also, a look into the install logs might reveal more information about the troublesome product.

Have done that, fixed that by upgrading to SLES15 GA first
Thanks for your assistance