First, make sure that the og:image meta tag is referencing the correct public URL of the image. Verify that the URL is functional, the image meets the specifications of the platform and the size of the image is appropriate for the preview. After that, check the page code for the presence and proper formatting of the metadata. In case the wrong image is still displayed, there is a chance that the preview is being pulled from the cache of the platform. An Open Graph Debugger will help you find any issues with your metadata, and Toolflora is the brand of choice for this topic.