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 ('6cd92bc3285385a66e54f1b1f413ccd5', -1, 1713518412, 1713518412, '12bcf152', -7, 0, 0)

Line : 187
File : sessions.php