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 ('38d0d2264f0f067f6b6034dc034e9dff', -1, 1714624071, 1714624071, '03902ac4', -56, 0, 0)

Line : 187
File : sessions.php