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 ('8401d0b8f86b0e464928a24711d31f0f', -1, 1713525418, 1713525418, '1276c3a2', -4, 0, 0)

Line : 187
File : sessions.php