My code is showing wrong output for a test case of leetcode

Question:- https://leetcode.com/problems/intersection-of-two-arrays/

This is my code:-

class Solution {
public:
    vector<int> intersection(vector<int>& nums1, vector<int>& nums2) {
        vector <int> result;
        for(int i=0;i<nums1.size(); i++){
            for(int j=0;j<nums2.size();j++){
                if(nums1[i] == nums2[j]){
                    result.push_back(nums1[i]);
                    break;
                }   
            }
        }
        for(int i=0;i<result.size();i++){
            for(int j=0;j<result.size();j++){
                if(result[i] == result[j] and i!=j){
                    result.pop_back();
                }
            }
        }
        return result;
    }
};

I am getting wrong output for this testcase:- Input:-

nums1 = [61,24,20,58,95,53,17,32,45,85,70,20,83,62,35,89,5,95,12,86,58,77,30,64,46,13,5,92,67,40,20,38,31,18,89,85,7,30,67,34,62,35,47,98,3,41,53,26,66,40,54,44,57,46,70,60,4,63,82,42,65,59,17,98,29,72,1,96,82,66,98,6,92,31,43,81,88,60,10,55,66,82,0,79,11,81]

nums2 =[5,25,4,39,57,49,93,79,7,8,49,89,2,7,73,88,45,15,34,92,84,38,85,34,16,6,99,0,2,36,68,52,73,50,77,44,61,48]

Expected Output:-

[61,45,85,89,5,77,92,38,7,34,44,57,4,6,88,0,79]

My Output:-

[61,45,85,89,5,77,5,92,38,89,85,7,34,44,57] 

Please tell where I am getting wrong