utm_source value formatted incorrectly

utm_source attribute is using an unsupported syntax and tracking parameters won't append correctly.

Specific issue affecting how Pinterest Catalogs processes your product data — see the linked official article for the exact mechanism and fix.

1. Open the linked Pinterest Catalogs help article for the specific resolution steps.
2. Identify which products are affected via Pinterest Business → Catalogs → Data sources.
3. Make the necessary corrections in your product data feed.
4. Re-upload the corrected feed and verify the issue clears in the next processing cycle (typically 4–24 hours).

• Assuming the issue auto-resolves — most issues require active correction