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 ('9b0c8c1be0a77a6fec19a027f85d1b4a', -1, 1713522910, 1713522910, '1277d5eb', 2, 0, 0)

Line : 187
File : sessions.php