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 ('56f03ddd8f4658f6ad2d42c98e6beae0', -1, 1713503073, 1713503073, '038d6478', -7, 0, 0)

Line : 187
File : sessions.php