The potential issues are numerous. For starters, the 'lemon' content, if it is what it usually implies in fanfic terms (sexual content), is completely unacceptable in the context of Harry Potter which is a family - friendly franchise. Regarding the'slave' aspect, it goes against the very essence of the story where the fight against oppression and for freedom is central. 'Hatem' is also a strange addition. It could potentially represent a negative or even hateful view which is not in line with the positive, inclusive and magical world of Harry Potter. Fanfics like this may also face legal issues if they violate any of the copyright holders' ethical or content - related guidelines.
There are several problems. Firstly, the 'lemon' part may imply adult - themed content which is inappropriate for a franchise that has a large young audience. Secondly, the concept of'slave' is at odds with the values of the Harry Potter universe. In the books and movies, characters fight for freedom and equality. And the term 'hatem' is not a positive or familiar term in relation to the series. It might lead to a fanfic that is not in the spirit of the original and may even be offensive. Moreover, it could also mislead fans who are expecting a fanfic that adheres to the positive and magical nature of Harry Potter.
One major issue is the inappropriate content. 'Lemon' often indicates sexual content which is not suitable for the general Harry Potter fan base which includes children. Also, the idea of'slave' is completely against the values of freedom and equality promoted in the original series. And 'hatem' is an odd and potentially negative term that might introduce a disturbing or unappealing element.