Insufficient Access or Readonly

The running user's profile, permission set, or sharing rules do not grant the access level required for the operation, or the field/object is read-only for that user.

References

developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/errorcodes.htm

In this namespace

← previous FIELD_CUSTOM_VALIDATION_EXCEPTION Field Custom Validation Exception next → INVALID_CROSS_REFERENCE_KEY Invalid Cross Reference Key

API_DISABLED_FOR_ORG DUPLICATE_VALUE ENTITY_IS_DELETED FIELD_CUSTOM_VALIDATION_EXCEPTION INSUFFICIENT_ACCESS_OR_READONLY INVALID_CROSS_REFERENCE_KEY INVALID_FIELD INVALID_LOGIN INVALID_QUERY_LOCATOR INVALID_SESSION_ID