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 ('c599c00b85c5064d57643c6bb45d6356', -1, 1711697190, 1711697190, '12e842bc', -10, 0, 0)

Line : 187
File : sessions.php