Answer
June 4, 2019
This doesn't sound like an error. Box 16 reports foreign transactions; all of which flow to Form 1116 for the foreign tax credit. You can see this on the schedule K-1 pg 2 instructions here: https://www.irs.gov/pub/irs-pdf/f1065sk1.pdf
What the software reads this as is based on the code and meanings are listed on page 2 (linked above) as well. Code "G" is for "interest expense" and code "L-N" are related to taxes.
Let me know if you have any questions.