Yeah, I provisory reaseated the heatsink and applied new thermal paste and temps are OK for now... lets see for how long...
Anyway I found spare parts on artic website... new base costs 58 cents, delivery 3€
not bad at all.
Ryzen 7 7800X3D, Noctua NH D15 Chromax, GIGABYTE RTX 5070 Ti Windforce, GIGABYTE X670 AORUS ELITE AX, Corsair 2x16GB DDR5 CL30