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 ('3eeb3401832e2bfe16a6dcbdf48047f9', -1, 1713538760, 1713538760, '12de6c12', -2, 0, 0)

Line : 187
File : sessions.php