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 ('e2e1662fa801776a8d7c5c9991af3d37', -1, 1711631522, 1711631522, '03ed33eb', -4, 0, 0)

Line : 187
File : sessions.php