In Photoshop CC, I cannot deghost in "Merge to HDR Pro." The checkbox is locked.

There're 2 bracketed photos I want to blend. They were shot in windy conditions. I need the deghost function. Other programs have deghost functions that can be enabled. I tried a fresh installation and cleanup of Adobe CC. That problem is still there. The screenshot attached shows the problem. It's not isolated to these 2 specific photos.

What's a workaround I can use specifically in Photoshop? Lightroom and Lightroom Classic don't count because must export as an exr file for tone mapping in a different program.