Hi @moshpanda
When I try to upload an updated file with new data to existing posts the data isn’t saved to my posts, it just stays empty or unmodified.
There are 2 ways to update existing posts:
1. If they were created with a “New Items” import, you can update the file, upload it to the existing import, and re-run it: https://www.wpallimport.com/documentation/recurring/update-import.
2. If they were created manually, or by a different import, you can use Manual Record Matching: https://www.wpallimport.com/documentation/recurring/manual-record-matching/.
Both of these methods rely on the Import Settings (step 4 for a new import, Manage Imports -> Import Settings for an existing one) to decide what will be updated. Please check the settings and make sure that “Update existing products with changed data in your file” is enabled and that the Title and ACF fields are set to be updated.
If the update fails again, can you post the import history log (or at least one entry from it where the data wasn’t updated)?