DynamoDB PutItem cannot handle numbers encoded as strings

[andyfase]

Bug Description

I am attempting to use the official AWS DynamoDB node

When I attempt to Insert/Update into a table with the has key being a string using the {{ $execution.id}} the code fails. Yet it I instead use {{ $execution.id.base64Encode()}} if works

The issue appears to be in the adjustPutitem method

if (typeof value === 'boolean') {
			type = 'BOOL';
		} else if (typeof value === 'object' && !Array.isArray(value) && value !== null) {
			type = 'M';
		} else if (isNaN(Number(value))) {
			type = 'S';
		} else {
			type = 'N';
		}

isNaN(Number(value)) will return False on a string that can be cast to a number i.e. "34" and execution IDs are indeed string encoded numbers.

IMO this should explicitly test for a type number, and fallback to string as default

if (typeof value === 'boolean') {
			type = 'BOOL';
		} else if (typeof value === 'object' && !Array.isArray(value) && value !== null) {
			type = 'M';
		} else if (typeof value === 'number) {
			type = 'N';
		} else {
			type = 'S';
		}

To Reproduce

1. Create workflow
2. Use AWS DynamoDB as the the workflow item
3. Connect AWS account, create DDB table with single hash key as a string
4. Map $execution.id to the hash key for insetion
5. Test and see it doesnt work

Expected behavior

The insertion should complete successfully.

Debug Info

Debug info

core

• n8nVersion: 2.6.3
• platform: docker (self-hosted)
• nodeJsVersion: 22.22.0
• nodeEnv: production
• database: sqlite
• executionMode: regular
• concurrency: -1
• license: community
• consumerId: unknown

storage

• success: all
• error: all
• progress: false
• manual: true
• binaryMode: filesystem

pruning

• enabled: true
• maxAge: 336 hours
• maxCount: 10000 executions

client

• userAgent: mozilla/5.0 (macintosh; intel mac os x 10_15_7) applewebkit/537.36 (khtml, like gecko) chrome/144.0.0.0 safari/537.36
• isTouchDevice: false

security

• secureCookie: false

Generated at: 2026-02-03T21:15:58.274Z

Operating System

AWS Linux

n8n Version

2.6.3

Node.js Version

22.22.0

Database

SQLite (default)

Execution mode

main (default)

Hosting

self hosted

[n8n-assistant]

Hey @andyfase,

Thank you for reaching out! We’ve received your issue and are looking into it. To help us track this internally, we’ve created a Linear ticket with the reference: "GHC-6648".

We’ll keep you updated as we make progress, but if you have any additional details or context to share, feel free to add them here - it’s always helpful!

Thanks for your patience and for bringing this to our attention.

---

For INTERNAL use only: GHC-6648