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 ('a92d5baaf98add130e9b4ced9c78d2c1', -1, 1711678361, 1711678361, '12d14257', -10, 0, 0)

Line : 187
File : sessions.php