After not finding a good thread about it, I was going top ask for help but found a solution while doing so. If you think there is no need for this thread then just move it to the greaveyard of bad threads.
1. Close osu! just do it before anything else, dont skip this step.
2. Open your osu! directory then move (or delete) all *.db files (db = data base). In my case there where seven but to be sure I also moved the file called "collection" and "scores".
3. Start osu. The game will find out that something is wrong and try to repair itself and it actually works! osu! will start processing the beatmaps again and this time it will take longer than usual but you can ALT TAB or go do your home work while waiting.
4. Optional: Close osu! again and move the file called "collection" and "scores" back to the osu! map folder (I problably didnt have to move these at all).
Feel free to correct me or contribute by adding more information to this thread. I dont know what im doing and I dont understand the exact purpose of the files or how they work but this fixed everything for me.
Back story: Some of my maps got corrupted when I had problem to transfer the whole osu! directory from one drive to another.
osu! version: Stable 20200118.2 (latest)
1. Close osu! just do it before anything else, dont skip this step.
2. Open your osu! directory then move (or delete) all *.db files (db = data base). In my case there where seven but to be sure I also moved the file called "collection" and "scores".
3. Start osu. The game will find out that something is wrong and try to repair itself and it actually works! osu! will start processing the beatmaps again and this time it will take longer than usual but you can ALT TAB or go do your home work while waiting.
4. Optional: Close osu! again and move the file called "collection" and "scores" back to the osu! map folder (I problably didnt have to move these at all).
Feel free to correct me or contribute by adding more information to this thread. I dont know what im doing and I dont understand the exact purpose of the files or how they work but this fixed everything for me.
Back story: Some of my maps got corrupted when I had problem to transfer the whole osu! directory from one drive to another.
osu! version: Stable 20200118.2 (latest)