@Skyeman
Thank you for joining HP Forums.
I'll be glad to help you 🙂
As I understand you've suddenly got following error message: Both cartridges incompatible,
No worries, as I'll be glad to help you, that said, I'll need a few more details to dissect your concern & provide an accurate solution:
Have you checked related HP Forum posts to help resolve your concern?
If you haven't, Here's a related HP Forums post that seems to have helped others: Click here for the steps.
If the issue persists, please Click here for further assistance.
If I have helped you resolve the issue, feel free to give me a virtual high-five by clicking the 'Thumbs Up' icon below,
Followed by clicking on "Accept as solution" from the drop-down menu on the upper right corner,
Thank you for posting in the HP Support Forum. Have a great day!
Regards,
Riddle_Decipher
I am an HP Employee