Bug in Database update query/ Bootstrap forms?

I previously created an update query (named apupdate). Since then I have changed some database table names and deleted some. I have unlinked and re-linked the the connection and the database update options in server connect now appear ok.
When i then add a bootstrap form there are 10 additional fields at the end of the form, some i have deleted and some since renamed.
I investigated the the relevant apupdate.php file and see these “extra” fields appear in the “meta” “$_POST” section of the file although the query within it is correct and does not have the additional fields.
Am i missing something regarding regenerating the “meta” data of could this be a bug?