Russian President Vladimir Putin will hold talks with Turkish President Tayyip Erdogan on Monday in the Russian Black Sea resort of Sochi.

The meeting will primarily discuss Black Sea grain exports.

U.N. Secretary-General António Guterres says he sent Russia “a set of concrete proposals” aimed at reviving a deal that allowed the safe export of Ukrainian grain via the Black Sea, where Russia controls Ukraine’s sea lanes.

Russia quit the deal in July – a year after it was brokered by the United Nations and Turkey – complaining that Western economic sanctions were hampering its own food and fertilizer exports in contravention of a parallel memorandum, and that not enough Ukrainian grain was going to countries in need.

The Black Sea grain deal was intended to combat a global food crisis that the United Nations said had been worsened by Russia’s full-scale invasion of Ukraine in February 2022, which Russia calls a “special military operation”.