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 ('7957ca0f0c68643ef8fcf95bafaf3e3b', -1, 1730415152, 1730415152, '12768ef5', 18, 0, 0)

Line : 195
File : sessions.php