Here’s the latest I can provide based on current public sources:
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The 1989 IAAF World Cup was held in Barcelona, Spain, from September 8–10, 1989. The competition brought together athletes representing continents and the host nation in a team-format meet, with medals awarded for individual events and a separate team points table. This event is part of the historical IAAF World Cup series, which ran from 1977 to 2006.
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As of now, there are no recent editions of the IAAF World Cup under that name; the meet has not been revived in its original continental-team format since the early 1990s. Contemporary World Athletics events use different formats (e.g., World Championships and Olympic Games) for continental or national-team competition, but the 1989 Barcelona edition remains a standalone historical result.
If you’d like, I can pull up a concise summary of medalists and the overall continent-team results from the 1989 Barcelona World Cup, or compile a small table of top individual event winners from that meet.