phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('788c09bf1e7f29cd7d410a0d2c01e8ca', -1, 1715114229, 1715114229, '12778f04', 7, 0, 0)

Line : 189
File : sessions.php