phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9647a2ed2ebf7050039a4be4cf2e1f0d', -1, 1715011947, 1715011947, '038accd0', -7, 0, 0)

Line : 189
File : sessions.php