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 ('f70452b5e9006ed9b701c0e2983b6fde', -1, 1713586504, 1713586504, '12760cde', -7, 0, 0)

Line : 187
File : sessions.php