I am trying to remove element from nested my by searching the key but I am getting error

Concurrent modification during iteration: Instance of ‘IdentityMap<String, String>’.

void main() {
  Map<String, dynamic> nestedMap = {
    'key1': 'value1',
    'key2': {
      'nestedKey1': 'nestedValue1',
      'nestedKey2': 'nestedValue2',
    },
    'key3': {
      'nestedKey3': {
        'nestedKey4': 'nestedValue3',
      },
    },
  };

  String keyToRemove = 'nestedKey2';

  // Traverse the nested map and remove the specific key
  removeKeyFromNestedMap(nestedMap, keyToRemove);

  // Print the updated nested map
  print(nestedMap);
}

void removeKeyFromNestedMap(Map<String, dynamic> map, String keyToRemove) {
  map.forEach((key, value) {
    if (value is Map) {
      removeKeyFromNestedMap(value, keyToRemove);
    } else if (key == keyToRemove) {
      map.remove(key);
    }
  });
}