I don't believe so, assuming you still owned ET at 12/31/2018 ... see IRS Partner's Instructions for Schedule K-1 (Form 1065), Part I, item M (checked yes on my ET K-1). Since no box 20, code W, and no "distributions subject to section 737, see the instructions for box 19, code B", on my ET K-1, it appears this statement is FYI only, for use at some future date when you dispose of your ET units.
