Why are all my tracks muting and soloing together?

Hello,

I have recently started using a Mac and I'm starting to get used to Logic Pro X. But when I open a certain project that I had worked on, and try to solo or mute individual tracks, ALL the tracks either mute or solo depending on which one I press.

The project I'm working on was made in Logic Pro X, but for some reason, all of the tracks are linked together whenever I press mute or solo.

I have not seen any solution on the internet so far. Please help and let me know as soon as possible, thank you.