Does the SQA punish self plagiarism?

I currently take higher Modern Studies and Politics and have started the assignment. Can I do the same topic and research or does it need to be different? Has anybody done this before because I imagine it must have but I can’t find anything in SQA guidelines. My teachers also said it’s ok but he is notorious for not doing thing properly like last year he did the AH Modarn dissertation wrong so I have no idea if it’s ok.
Thank you so much