databaseChangeLog:
  - changeSet:
      id: 0012--drop-unique-gateway-txid-2
      author: jjo
      changes:
        # 1) Eliminar el índice UNIQUE actual
        - dropIndex:
            indexName: uq_tx_gateway_txid
            tableName: payment_transactions

        # 2) Crear un índice normal (no único) sobre gateway_transaction_id
        - createIndex:
            indexName: idx_tx_gateway_txid
            tableName: payment_transactions
            columns:
              - column:
                  name: gateway_transaction_id

      rollback:
        # Rollback: volver al índice UNIQUE como estaba antes
        - dropIndex:
            indexName: idx_tx_gateway_txid
            tableName: payment_transactions

        - createIndex:
            indexName: uq_tx_gateway_txid
            tableName: payment_transactions
            unique: true
            columns:
              - column:
                  name: gateway_transaction_id