paperclipai/paperclip · error · Error

Unsupported Discord correction field

Error message

Unsupported Discord correction field

What it means

While collecting modal values into a correction draft, each modal child must be a supported input type (text_input or select). This error is thrown when a modal child has an unrecognized or unsupported component type, so the correction draft cannot be built faithfully from the submitted values.

Source

Thrown at server/src/services/chat-discord-question-forms.ts:170

      now.getTime() + CORRECTION_TTL_MS,
    ),
  );
  if (
    !Number.isFinite(expiresAt.getTime()) ||
    expiresAt <= now ||
    input.modal.callbackId !== input.submitActionId ||
    input.modal.privateMetadata !== input.submitActionId ||
    input.modal.children.length < 1 ||
    input.modal.children.length > 5
  )
    throw new Error("Discord form correction is not current");
  const values: Record<string, string> = {};
  const messages: string[] = [
    "Please check your answers, then select Edit answers.",
  ];
  for (const child of input.modal.children) {
    if (child.type !== "text_input" && child.type !== "select")
      throw new Error("Unsupported Discord correction field");
    const value = input.values[child.id];
    const error = input.fieldErrors[child.id];
    // Both label and error are produced by canonical form validation, never
    // provider labels/error bodies. Opaque input IDs are not visible copy.
    if (error) messages.push(`${child.label}: ${error}`);
    if (typeof value !== "string") continue;
    if (child.type === "text_input") {
      const maximum = Math.min(child.maxLength ?? 4000, 4000);
      values[child.id] = value.slice(0, maximum);
      if (value.length > maximum)
        messages.push(
          `${child.label}: This draft was shortened to ${maximum} characters.`,
        );
    } else if (child.options.some((option) => option.value === value))
      values[child.id] = value;
  }
  const {
    modal: _modal,

View on GitHub (pinned to 01ad858492)

Solutions

  1. Inspect the modal children and remove or replace any unsupported component type before submission
  2. Extend the handler to explicitly support the new child type and map its value
  3. Check for library/package updates that changed Discord component type names

Example fix

// before
if (child.type !== "text_input" && child.type !== "select")
  throw new Error("Unsupported Discord correction field");
// after
if (child.type === "text_input" || child.type === "select" || child.type === "new_component") {
  // handle child
} else {
  throw new Error("Unsupported Discord correction field");
}
Defensive patterns

Strategy: type-guard

Validate before calling

function allChildrenSupported(children) {
  return children.every((c) => c.type === "text_input" || c.type === "select");
}
if (!allChildrenSupported(modal.children)) throw new Error("build modal with supported field types only");

Type guard

const isSupportedChild = (c) => c && (c.type === "text_input" || c.type === "select");

Try / catch

try {
  await retainDiscordQuestionFormCorrection(...);
} catch (err) {
  if (err.message === "Unsupported Discord correction field") {
    // rebuild modal with supported types
    return respondWithRebuiltForm();
  }
  throw err;
}

Prevention

When it happens

Trigger: A modal contains a component whose type is neither 'text_input' nor 'select' (e.g. a newer Discord component kind, or a malformed custom-built child); the modal schema was extended elsewhere without updating this retention path.

Common situations: A developer adds a new modal component type (e.g. a new Discord input variant) to the form builder but forgets to support it in retainDiscordQuestionFormCorrection; a Discord API update introduces new component types.

Understand the failure class

Background: UnsupportedOperationException and "is not supported" errors: when a library deliberately refuses a call — this error's family across 30 libraries.

Related errors

AI-assisted analysis of paperclipai/paperclip@01ad858492 (2026-09-10). Data as JSON: /api/errors/4bef957a035cc217. Report an issue: GitHub.