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Dex 666
Level 2
September 17, 2026
Question

New parameter in Custom Action - existing Custom Action and Journey

  • September 17, 2026
  • 2 replies
  • 25 views

I need to add a new parameter to a Custom Action (it already works in live journey). The only solution is to create a new Custom Action and new version of a journey? 

2 replies

Pulkit_Jain_
Adobe Employee
Pulkit_Jain_Adobe Employee
Adobe Employee
September 17, 2026

​@Dex 666 

No, you don't need a new Custom Action. Just edit the existing one and add the new parameter.

But the journey does need a new version: live journeys only allow in-place edits to name/message content, mapping a new action parameter is a structural change, so it requires creating and publishing a new journey version.

SatheeskannaK
Community Advisor
SatheeskannaKCommunity Advisor
Community Advisor
September 17, 2026

​@Dex 666 

Payload Structure: You cannot modify the request payload or alter existing variables.

Response Configuration: You cannot change the action response parameters or error response mappings.

The exception is that updates to header and query parameters depend solely on the journey’s status.

If the referenced journey is in a DRAFT status, you can still add new HTTP header fields or query parameter fields to the custom action configuration.

However, if the journey is LIVE, these fields are completely locked. You need to duplicate the custom action and make the necessary changes.

 

Thanks, Sathees
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