phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d0126e6ded3e8671ac6754193eab5f12', -1, 1713920751, 1713920751, '030f97d6', 0, 0, 0)

Line : 187
File : sessions.php