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 ('9ec53a8c572b7d9fe57c45cc146c9f94', -1, 1731972781, 1731972781, 'ac120003', 3, 0, 0)

Line : 187
File : sessions.php