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 ('231fe33f38c1f1c00d31c6b5012d7640', -1, 1713627863, 1713627863, '12e2b1df', 4, 0, 0)

Line : 187
File : sessions.php