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 ('4d550b58ed04dc0fcc75e7c4fc84c60d', -1, 1711639556, 1711639556, '36e27e26', -8, 0, 0)

Line : 187
File : sessions.php