denoland/deno · error · TypeError

Invalid mutation 'delete' with value

Error message

Invalid mutation 'delete' with value

What it means

Error "Invalid mutation 'delete' with value" thrown in denoland/deno.

Source

Thrown at ext/kv/01_db.ts:485

    for (let i = 0; i < checks.length; ++i) {
      const check = checks[i];
      ArrayPrototypePush(this.#checks, [check.key, check.versionstamp]);
    }
    return this;
  }

  mutate(...mutations: Deno.KvMutation[]): this {
    for (let i = 0; i < mutations.length; ++i) {
      const mutation = mutations[i];
      const key = mutation.key;
      let type: string;
      let value: RawValue | null;
      let expireIn: number | undefined = undefined;
      switch (mutation.type) {
        case "delete":
          type = "delete";
          if (mutation.value) {
            throw new TypeError("Invalid mutation 'delete' with value");
          }
          break;
        case "set":
          if (typeof mutation.expireIn === "number") {
            expireIn = mutation.expireIn;
          }
          validateExpireIn(expireIn);
          /* falls through */
        case "sum":
        case "min":
        case "max":
          type = mutation.type;
          if (!ObjectHasOwn(mutation, "value")) {
            throw new TypeError(`Invalid mutation '${type}' without value`);
          }
          value = serializeValue(mutation.value);
          break;
        default:

View on GitHub (pinned to 89f33cbef2)

When it happens

Trigger: Thrown at ext/kv/01_db.ts:485 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of denoland/deno@89f33cbef2 (2026-08-16). Data as JSON: /api/errors/f0819c6669050d89. Report an issue: GitHub.