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 ('a8f882f3b298eaf58ca015a7c2a210e9', -1, 1708705418, 1708705418, '2cdc3eb7', -11, 0, 0)

Line : 187
File : sessions.php