PILLAR 4, AUTHORITY NETWORK · 4.1 Structured data validityMediumInferred
Unstable/duplicate @id
What it is
Entity @id not stable/unique.
Why it matters
Weakens entity linking across pages/sources.
How to fix it
Use stable, unique @id values.
Impact
Low-medium for entities. Inferred.
Evidence
Stable identifiers aid entity understanding. Google Search Central, Structured data general guidelines