VPAID-and-simid-both-present
Both VPAID and SIMID creatives present in the same <MediaFiles>
InfoMigrationSIMID 1.2 §2.2, IAB VPAID 2.0 (deprecated)
The block contains both a VPAID and a SIMID . This is a valid dual-stack configuration used during migration: SIMID-capable players will use the , while older VPAID-capable players fall back to the . However, it may signal an incomplete migration rather than an intentional dual-stack, and the VPAID entry still carries all the platform compatibility risks. Once SIMID coverage is sufficient for your inventory, remove the VPAID entry.
How to fix
If this is intentional, no immediate action required. Monitor VPAID delivery rate vs SIMID delivery rate. Once SIMID fill is sufficient, remove the VPAID <MediaFile> to clean up the tag.
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