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 ('210ca994688a626e1b4dbdb5653f7660', -1, 1713871726, 1713871726, '12de4598', -10, 0, 0)

Line : 187
File : sessions.php