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 ('ef0b8ca763ddd6ed09c76cc97235d0bd', -1, 1713558031, 1713558031, '12d954ab', -7, 0, 0)

Line : 187
File : sessions.php