Clear parent shortcut (alt+P) doesn't work

Hi.
my title says what’s my issue.
Can anyone please help?
thank you.

That are too less information about the problem and would be a guessing game.
Are there an error message?
Can you show a screenshot of the child object?
Maybe shortcuts are messed up, did the unparent dialog come up?

Hi. Sorry for the lack of information I am kind of frustrated and needed immediate help. As of what you ask,

-there are no error message.

-sorry, I am not allowed. there’s an Non Disclosure Agreement contract in this project.

no unparent dialog is showing when I push the shortcut.

There is a person before me who uses this blend file that I was working on now. Does that mean the personalized shortcut is stored on each blend file?

No, that would be terrible if blender do such a thing.

If you create a new parent → child relation, can you unparent then?
Verify that there is a parent:

Hi. I figured out my problem. Its the key layout. I’m on Manjaro Linux and you need to tweak the right alt to work like the left alt.