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 ('723e3d32f3c0b2d69bf4024149081519', -1, 1713962270, 1713962270, '12bfd8a3', -4, 0, 0)

Line : 187
File : sessions.php