Exclamation point in front of every calendar event

[bibyfok]

Hello,

Does anyone has an idea what is this exclamation point in front of every of my events?
I tried to reboot etc nothing makes it go away !

Thanks

 

[Tyler23]

Hello,

Does anyone has an idea what is this exclamation point in front of every of my events?
I tried to reboot etc nothing makes it go away !

Thanks

Do you have another calendar event at the same time?

 

[bibyfok]

Do you have another calendar event at the same time?

Clever

Thanks !