According to Reuters, citing four OPEC sources

OPEC+ members will be meeting this weekend in Algiers and it looks like there won't be any changes to the current arrangement in June. However, the key issue that will be debated will be that of Iran's oil production.

Saudi Arabia and other OPEC members are looking to cover the shortfall by Iran that is set off by US sanctions. However, Iran has so far been against that - likely fearing that they will lose the market share permanently if they allow other nations to do so (but also it will lower oil prices).