error 3050003 comparison of assets with different symbols is not allowed

执行交易时提示

1125331ms thread-0   http_plugin.cpp:406           handle_exception     ] Exception Details: 3050003 eosio_assert_message_exception: eosio_assert_message assertion failure
assertion failure with message: comparison of assets with different symbols is not allowed
    {"s":"comparison of assets with different symbols is not allowed"}
    thread-0  wasm_interface.cpp:930 eosio_assert

    {"_pending_console_output.str()":""}

是因为交易中的代币符号与系统内的代币符号不一致。
可参考 （修改系统默认的代币SYS为EOS）