I can't create my custom primary key on the target database

Both databases are in Aurora MySql

In the source database I've a table with serveral fields and the primary key uses only one column 'id'.

In the target database, I need to change the primary key to use two columns: 'platform' + 'id'.

When launch the migratrion task, the target table is created but the primary key is the same as in the source (only with the 'id' column).

This is the JSON of the rules:

{

"rules": [

{
  "rule-type": "selection",
  "rule-id": "10",
  "rule-name": "10",
  "object-locator": {
    "schema-name": "bbdd_in%",
    "table-name": "str_course_cat%"
  },
  "rule-action": "include",
  "filters": []
},
{
  "rule-type": "transformation",
  "rule-id": "21",
  "rule-name": "21",
  "rule-target": "schema",
  "object-locator": {
    "schema-name": "%",
    "table-name": "%"
  },
  "rule-action": "rename",
  "value": "dw"
},
{
  "rule-type": "transformation",
  "rule-id": "22",
  "rule-name": "22",
  "rule-target": "column",
  "object-locator": {
    "schema-name": "%",
    "table-name": "%"
  },
  "rule-action": "add-column",
  "value": "platform",
  "expression": "$AR_M_SOURCE_SCHEMA",
  "data-type": {
    "type": "string",
    "length": "50",
    "scale": ""
  }
},
{
  "rule-type": "transformation",
  "rule-id": "23",
  "rule-name": "23",
  "rule-target": "table",
  "object-locator": {
    "schema-name": "%",
    "table-name": "%"
  },
  "rule-action": "define-primary-key",
  "primary-key-def": {
    "name": "PRIMARY",
    "origin": "primary-key",
    "columns": [
      "platform",
      "id"
    ]
  }
}

]

}