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 ('804231b893259e72a0928d2a39e09b52', -1, 1714041715, 1714041715, '038cc6ad', 4, 0, 0)

Line : 187
File : sessions.php