I also have same problem, spent days working on the return and found this issue just before I am ready to e-file (no other errors), this is really frustrating. I have some K-1 forms from REITs, and I have same forms from prior year, which used aggregation mode in previous year's return with e-file without any problems. I had been using TurboTax for 8 years and this is really disappointing.
I also tried deleting the 8995A form but didn't work, I am using mac version.
If anyone has a workaround please let me know. QBI only has a small amount impact on my return so I am fine with not claiming it.
