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 ('620ef78a77dc16d2a2541639f37cbddc', -1, 1714003436, 1714003436, '0391b29d', -2, 0, 0)

Line : 187
File : sessions.php