"We are in a unique situation in the history of the organisation," a European diplomat said on condition of anonymity ahead of a meeting later this month that others warn could fatally undermine the global trade body if the deal is not rescued.
A draft of the so-called Trade Facilitation Agreement emerged at the WTO's Bali conference in December last year and was meant to be finalised at the end of July.
India and its supporters say such stockpiling is essential to ensure poor farmers and consumers survive in the cut-throat world of business, while Western countries meanwhile have raised concerns that this food could be syphoned onto global markets, skewing trade.
If WTO gives in to India's demands, this would "create a very bad precedent", the European diplomat said, warning this would open a Pandora's box as other member states would certainly take the move as a licence to change positions and block texts they had helped pass by consensus.
The Europeans staunchly insist that Bali cannot be renegotiated, the diplomat said, warning that WTO's credibility was at stake.
Instead, "we need to find a solution based on Bali," the diplomat said.
The 160 countries which make up the WTO set trade rules among themselves in an attempt to ensure a level playing field and spur growth by opening markets and removing trade barriers, including subsidies, excessive taxes and regulations.
Bali was the first multilateral agreement concluded by the WTO since its inception in 1995.
It took nearly a decade to conclude the trade facilitation part of the talks, which began in 2004, and the organisation is loath to return to the drawing board.
At Bali, India was granted the right to continue its food stockpiling subsidies until a final solution is found by the end of 2017.
But last July the country insisted it wanted the issue conclusively settled by the end of this year.
