SR076

Severity: error

Summary: array field has nested array items (not supported)

What this means

An array-typed field declares items: { type: array, ... }, creating a nested array. Shaperail does not support arrays of arrays. If you need to store a complex nested structure, use type: json instead.

Example that triggers this

schema:
  tags: { type: array, items: { type: array, items: string } }

How to fix it

Change the field type to json for nested structures, or flatten the data model:

tags: { type: json }