Either, V2 has new patches though.
I have no idea why this is happening but it could be an installation issue or it could be something on my end. I didn't encounter this during my testing but I don't have time at the moment to check further.
I believe this is something I fixed partly in a newer version of my patches (original link to fully modded only had V1). Still, I would recommend just downloading the new fully modded pack I made that doesn't have the expanded mod or it's patches as it'll likely be a more seamless experience:
https://f95zone.to/threads/hazumi-and-pregnation-v1-11-1-mihiraghi.33392/post-13125943
You
should be able to transfer your saves over without any issues.