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 ('45f1283f86c4c191814c16ab7e7a369f', -1, 1711665835, 1711665835, '0353575e', -11, 0, 0)

Line : 187
File : sessions.php