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 ('9e1c2392d5aa1498edd8d4f7d15ae3ba', -1, 1714037349, 1714037349, '12e33083', 0, 0, 0)

Line : 187
File : sessions.php