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 ('9fe944d87952e949cfc4893705bca39e', -1, 1730419485, 1730419485, '12de6a2b', 17, 0, 0)

Line : 195
File : sessions.php