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 ('592d7da1230696f0136e0b376c0364ad', -1, 1713860912, 1713860912, '12743fae', -7, 0, 0)

Line : 187
File : sessions.php