# Update budget global

Update an existing global variable

Endpoint: PUT /projects/{projectId}/budget/globals/{globalId}
Version: 1.0.0
Security: ApiKeyAuth

## Path parameters:

  - `projectId` (string, required)
    Project identifier (alias or ID)
    Example: "nike-spring-2024"

  - `globalId` (string, required)
    Global variable identifier (alias or ID)
    Example: "exchange-rate"

## Request fields (application/json):

  - `symbol` (string)
    Updated symbol
    Example: "EUR_RATE_2024"

  - `description` (string)
    Updated description
    Example: "EUR to USD exchange rate 2024"

  - `formula` (string)
    Updated formula
    Example: "0.92"

  - `unit` (string)
    Updated unit
    Example: "currency"

  - `idMode` (string)
    ID interpretation mode - "user" for human-friendly IDs (default), "system" for database IDs
    Enum: "user", "system"

## Response 200 fields (application/json):

  - `id` (string, required)
    Global variable system identifier
    Example: "global-001"

  - `symbol` (string,null)
    Variable symbol for use in formulas
    Example: "EXCHANGE_RATE"

  - `description` (string,null)
    Variable description
    Example: "USD to EUR exchange rate"

  - `unit` (string,null)
    Unit of measurement
    Example: "currency"

  - `formula` (string,null)
    Formula expression for calculating value
    Example: "1.08"

## Response 400 fields (application/json):

  - `error` (string, required)
    Error message
    Example: "Invalid request parameters"

  - `details` (object)
    Additional error details
    Example: {"field":"projectId","reason":"Project not found"}

  - `code` (string)
    Error code
    Example: "VALIDATION_ERROR"

## Response 401 fields (application/json):

  - `error` (string, required)
    Error message
    Example: "Invalid request parameters"

  - `details` (object)
    Additional error details
    Example: {"field":"projectId","reason":"Project not found"}

  - `code` (string)
    Error code
    Example: "VALIDATION_ERROR"

## Response 404 fields (application/json):

  - `error` (string, required)
    Error message
    Example: "Invalid request parameters"

  - `details` (object)
    Additional error details
    Example: {"field":"projectId","reason":"Project not found"}

  - `code` (string)
    Error code
    Example: "VALIDATION_ERROR"

## Response 500 fields (application/json):

  - `error` (string, required)
    Error message
    Example: "Invalid request parameters"

  - `details` (object)
    Additional error details
    Example: {"field":"projectId","reason":"Project not found"}

  - `code` (string)
    Error code
    Example: "VALIDATION_ERROR"