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 ('b755279d2f1e4ccdf9c0f162b0128538', -1, 1714607376, 1714607376, '12769172', -52, 0, 0)

Line : 187
File : sessions.php