MIWA PR.DAF Cylinder does not turn in the unlocking direction

"Sometimes it doesn't turn in the locking direction."

Last time's Griffin was Clavis (CLAVIS), but this time it was PR.

I thought it would be a simple cleaning, but I ended up disassembling it to the core. If you look closely, you'll notice that it only rotates in one direction. Locking bar is locked.

There is no problem in disassembling it and examining it to see if there is a scratch on the outer cylinder or locking bar. Furthermore, after removing the locking bar and examining the movement of the tumbler, I discovered that the reason it was not rotating was because the tumbler was moving and the shear line was shifting.

It was a #5 to #7 tumbler in the middle. I checked with a spare key to see if the cylinder was worn out or the key was defective, and it turned smoothly with the spare key. It turned out that there was something wrong with the regular key.