Someone had a problem doing this and he solved his issue by doing the following:
1. Create a new save Game plus in your Spider-Man game.
2. Transfer it from your PS4 to your computer
3. Open my save in advanced mode in Save Wizard
4. Export it to a file on your hard drive
5. Open -your- saved game+ in Save Wizard
6. Import the saved file
7. Edit the first HEX value (I believe it's 00) and apply changes
8. Copy this edited save back to your PS4
that should work. Good luck.