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 ('0af8734845222c3209f6c3ec6fd6ab31', -1, 1713564141, 1713564141, '12dd8d2c', -4, 0, 0)

Line : 187
File : sessions.php