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 ('e6f8979ab4b95b01b783c42d7b7e330f', -1, 1711698610, 1711698610, '0353bb24', -4, 0, 0)

Line : 187
File : sessions.php