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 ('9a32a5f3ee46f252572b0c2a0210bc36', -1, 1713551766, 1713551766, '030f93d7', 2, 0, 0)

Line : 187
File : sessions.php