If you don't mind spending a bit of money but don't want to go all the way in on framing it, you could try something like a magnetic poster frame (not specifically endorsing this brand, just linking as an example). It basically uses magnets to clamp the top and bottom of the poster between pieces of wood and then you can hang it from that, rather than trying to stick the poster itself directly to your wall.

Basic ones on amazon will run you around $30 for one large enough to hold that album's giant poster (packaging info says 920mm = 36.22in so I linked the 37in option above). More expensive ones with nicer wood and more color options exist as well (I've seen Hanger Frames mentioned by other users around kpop reddit for poster hanging, a 37" one there will be around $50 before shipping).

I can't guarantee that the bottom weight will be heavy enough to weigh out the creases on its own, but it should be less likely to actually fall off your wall than the blue tack method since you can use something a little more heavy duty to hang the frame. It'll also prevent damage to your poster from any residue in the tack since it's just held together by magnets.