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 ('277d1970c657e5f6c4b0f1e4f4db8cd9', -1, 1713265866, 1713265866, '12bc28cf', 3, 0, 0)

Line : 187
File : sessions.php