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 ('d638ca97a2561700231fa0476449b3f6', -1, 1713899902, 1713899902, '039368f8', -10, 0, 0)

Line : 187
File : sessions.php