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 ('6c311aab9892947e7936c5bf14fe8f8e', -1, 1713580733, 1713580733, '030c296a', 2, 0, 0)

Line : 187
File : sessions.php