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 ('935e22a7a8ae20ec3d1d515930073bad', -1, 1711723593, 1711723593, '36aca24e', -11, 0, 0)

Line : 187
File : sessions.php