$action-create tiddler not overwriting tiddlers

[Jean-Pierre Rivière]

I have a tiddler $:/temp/project which exsts with its data, including some extra field.

I am asking a new $:/temp/project with less fields and do:

<$action-createtiddler $basetitle="$proto$" $overwrite=yes  fiel01=foo field02=bar/>

well' tge tiddler sill holds the old fields. the new fields are there with their new values.

have I set something wrong?