What could be the problem with the request?

Question

MySQL

Good afternoon, ladies and gentlemen.
Here is my error.

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1-2017-07-31-1' for key 'tracker_user_id_ymd_action_unique'

2017-07-31data at the PHP level. And there are some 1.
Thanks for the help :)

Answer 1

The field is unique, and you put something the same there that already exists.