EP4349403B1 - Monohydrate and Crystalline Forms of 6-[(3s,4s)-4-Methyl-1- (pyrimidin-2-Ylmethyl)pyrrolidin-3-Yl]-3-Tetrahydropyran-4-Yl- 7h-Imid Azo [1,5- A] Pyrazin-8-One