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 ('fa839ded1e17e0aad581f3651746f24c', -1, 1714038059, 1714038059, '0389a1de', 2, 0, 0)

Line : 187
File : sessions.php