UPDATE site_documents
SET draft_json = replace(draft_json, '"/images/hero-bg-v1.png"', '"/images/hero-bg-v3.webp"'),
    published_json = replace(published_json, '"/images/hero-bg-v1.png"', '"/images/hero-bg-v3.webp"')
WHERE draft_json LIKE '%"/images/hero-bg-v1.png"%'
   OR published_json LIKE '%"/images/hero-bg-v1.png"%';