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 ('9d60d2afc511e0521b223387631c2f98', -1, 1713864783, 1713864783, '038579a0', -4, 0, 0)

Line : 187
File : sessions.php