Source file size does not match the catalog entry
Copy-from-public-catalog (or similar) returned 409 Source file size does not match the catalog entry. when storage size ≠ catalog sizeBytes.
Why this happens
Catalog metadata is stale, the blob was replaced/truncated, or a partial write. Related size issues include remote upload mismatches.
Diagnose and fix
1. Retry later; refresh the public catalog listing.
2. Admin/storage: verify the source blob on disk matches the catalog row.
3. See User public catalogs / Public catalog opt-in.
4. Re-upload or re-index the source if the file was corrupted.