Problem: You are trying to create translations for the Dutch language, but some pages aren't connected to the correct main translation page. Solution: We recommend manually linking already translated pages using the WPML UI. You can follow the step-by-step guide here: https://wpml.org/faq/how-to-link-already-translated-pages/ If you are considering creating a custom query, it might be useful to understand how WPML stores language data in the database. You can find more information here: https://wpml.org/documentation/support/wpml-tables/ However, we strongly advise against direct modifications to the database unless absolutely necessary, as this can lead to unexpected issues.
If this solution does not apply to your case, or if it seems outdated, please do not hesitate to open a new support ticket. We also highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins.