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 ('b4ccdb7bdf68b8dc1fc2ff3f520630f9', -1, 1713616665, 1713616665, '12de6c12', -4, 0, 0)

Line : 187
File : sessions.php