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 ('f2f7ff911563467c464ae3e66ab915b2', -1, 1713569480, 1713569480, '038583a8', -4, 0, 0)

Line : 187
File : sessions.php