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 ('287f3402d2fbeb24d3a516782452c237', -1, 1713578846, 1713578846, '12e318d1', -4, 0, 0)

Line : 187
File : sessions.php