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 ('39748bb4aa2b12b798899d71ce3418ec', -1, 1713410665, 1713410665, '038a7811', 7, 0, 0)

Line : 187
File : sessions.php