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 ('474f9243d94e778b6f65e5c8bc42cb08', -1, 1714033654, 1714033654, '030f05b7', -4, 0, 0)

Line : 187
File : sessions.php