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 ('e38bec9ef1428282e3e3f5cf99160dc1', -1, 1713306020, 1713306020, '12e02056', 2, 0, 0)

Line : 187
File : sessions.php