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 ('8c9fc8aa5c2cbbb88050f29aa0c1c887', -1, 1730418421, 1730418421, '038e9cca', -1280, 0, 0)

Line : 195
File : sessions.php