REST API Variable - Impossible to add variable alias

Hello there,

I am creating a script to implement our design system tokens in our Figma files. So I am using the variables API. It works when I created variables with values like COLORS/FLOAT but when I am trying to add alias to another variable it didn’t work.

My first question is, which id should I use to link another variable to it. On this screenshot: "id" or "subscribed_id"?

To explain my situation, I have two files, A and B. File A contains many variables and I want to link my variables in file B to the variables in file A. The library in file A is published and added to file B.

In file A, when I retrieve the published variables, I find my variable:

            "VariableID:62:47": {
                "id": "VariableID:62:47",
                "subscribed_id": "VariableID:f42c18f818106af0843093aaf39f8f68705af7f0/1403:183",
                "name": "border-radius/0",
                "key": "f42c18f818106af0843093aaf39f8f68705af7f0",
                "variableCollectionId": "VariableCollectionId:62:46",
                "resolvedDataType": "FLOAT",
                "updatedAt": "2024-01-19T14:29:13.559Z"
            },

When I want to link to this variable in file B, I get the following error:

{
  status: 400,
  error: true,
  message: 'Invalid alias: VariableID:f42c18f818106af0843093aaf39f8f68705af7f0/1403:183 does not exist (variable: VariableID:128:9, mode: 504:0).'
}

If I try to make this link manually on the Figma website, it works as you can see with this API response:

            "VariableID:128:9": {
                "id": "VariableID:128:9",
                "name": "border-radius/native/0",
                "remote": false,
                "key": "7abc432b27e4538f6ce66421848864a9a021ce81",
                "variableCollectionId": "VariableCollectionId:128:8",
                "resolvedType": "FLOAT",
                "description": "",
                "hiddenFromPublishing": false,
                "valuesByMode": {
                    "128:0": {
                        "type": "VARIABLE_ALIAS",
                        "id": "VariableID:339b4b1cb132b20c5b54a084a8d15841544a6d4e/294:45"
                    },
                    "504:0": {
                        "type": "VARIABLE_ALIAS",
                        "id": "VariableID:f42c18f818106af0843093aaf39f8f68705af7f0/1403:183"
                    },
                }
            }

So, do you think there’s an error with your API or that I’ve got a problem with my code?