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 ('3781d00585b11690769e0deacc4e7cf3', -1, 1713881605, 1713881605, '12e318d1', -8, 0, 0)

Line : 187
File : sessions.php