OpenMP: copying vector using ' multithreading'

For a certain coding application i need to copy a vector consisting of big objects, so i want to make it more efficient. I'll give the old code below, with an attempt to use OpenMP to make it more efficient.

std::vector<Object> Objects, NewObjects;
Objects.reserve(30);
NewObjects.reserve(30);
// old code
Objects = NewObjects;

// new code
omp_set_num_threads(30);
#pragma omp parallel{
    Objects[omp_get_thread_num()] = NewObjects[omp_get_thread_num()];
}

Would this give the same result? Or are there issues since i access the vector ' Object' . I thought it might work since i don't access the same index/Object.

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