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 ('86aa9979a86a9393f3bc5600df12ca5a', -1, 1713486737, 1713486737, '127784df', 4, 0, 0)

Line : 187
File : sessions.php