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 ('e7fc76538a7179c3a749dd36bb4de780', -1, 1711716990, 1711716990, '22e4f006', 3, 0, 0)

Line : 187
File : sessions.php