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 ('52a1fef7ed0aa9d4da7f5e3e9c1d3235', -1, 1713895753, 1713895753, '031196a3', 6, 0, 0)

Line : 187
File : sessions.php