SR078

Severity: error

Summary: array items.format is only valid when items.type is string

What this means

An array field’s items spec has a format: attribute but the items type is not string. The format attribute only applies to string items (e.g., format: email). Using it on integer, uuid, or other types is invalid.

Example that triggers this

schema:
  counts: { type: array, items: { type: integer, format: email } }

How to fix it

Remove items.format, or change items.type to string:

emails: { type: array, items: { type: string, format: email } }