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 ('2b6299a320ddffcd0a968f0da400f90b', -1, 1713558831, 1713558831, '12742ad0', -10, 0, 0)

Line : 187
File : sessions.php