strapi/packages/strapi-admin/validation/common-functions/check-fields-are-correctly-nested.js

const checkFieldsAreCorrectlyNested = fields => {
  if (!Array.isArray(fields)) {
    // Only check if the fields exist
    return true;
  }

  let failed = false;
  for (let indexA = 0; indexA < fields.length; indexA++) {
    failed = fields
      .slice(indexA + 1)
      .some(fieldB => fieldB.startsWith(fields[indexA]) || fields[indexA].startsWith(fieldB));
    if (failed) break;
  }

  return !failed;
};

module.exports = checkFieldsAreCorrectlyNested;