This is practical accessibility guidance for first-pass triage. It is not legal advice, a formal audit, WCAG certification, or a conformance guarantee.
What this means
The same id value appears more than once on the page.
Why it matters
Duplicate IDs can break labels, descriptions, skip links, and scripted behaviour.
How to fix it
- Make every id unique.
- Fix repeated component instances that reuse the same id.
- Update label, aria-labelledby, aria-describedby, and anchor references after renaming ids.
What automated checks can detect
A checker can detect repeated id attribute values.
What still needs manual review
Retest labels, descriptions, skip links, modals, and tabs after changing ids.
Automation cannot confirm every script and reference still works after a fix.