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 ('ff8278e6de8b041c0d6b390b20d8da39', -1, 1713984954, 1713984954, '038d1886', -9, 0, 0)

Line : 187
File : sessions.php