This has been covered extensively in older posts. You could search from posts by "Badbernanke" and "Porciuscato".
These are just accounging gains and losses that arise out of the big hedge book that LINE maintains. The book rises and falls with the prices of the commodities being hedged but the numbers are not important. What is important is free cash flow which is the actual money coming in with which LINE can pay the distribution and its expenses etc. LINE's coverage is over 1.1 and going higher.
They have tons of cash.
They are following a disciplined strategy to preserve the distribution and grow the company in the long term.