Renault and Nissan Motor are to cancel a planned announcement on Wednesday of a deal to restructure their auto alliance as they work to resolve their differences, three people with knowledge of the situation said.

Renault wants Nissan to invest in its electric car business, while Nissan wants to sell part of Renault’s 43% stake to Nissan to put the two partners on a level playing field.

The French and Japanese automakers still have different views on how to divide intellectual property, said the people, who declined to be identified.

Renault and Nissan declined to comment.

The companies planned to announce the new alliance structure as early as this month, Reuters reported this week. If more time is needed for talks, the companies could meet a week later, starting on December 7, and plan to prepare for an announcement next week in London, the sources told Reuters.