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 ('fef3a43846807bc017c57c2b79831bde', -1, 1714008914, 1714008914, '038be92b', -4, 0, 0)

Line : 187
File : sessions.php