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 ('4a38c558743a2d1b54067bef0934c113', -1, 1713305818, 1713305818, '038d2fdd', -10, 0, 0)

Line : 187
File : sessions.php