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 ('a1c09f84da90a12d34b1c057a6fbcb15', -1, 1713592854, 1713592854, '12dc3b45', -10, 0, 0)

Line : 187
File : sessions.php