Dear Experts

I have Database WEIGHT.
After opening project, when I issue following command

Validate database

then following lines appears

Validate Database WEIGHT:
Rebuilding structural index.... Index rebuilt.
Object #11 (Index 'userid'): Tag not found in structural CDX for table 'login.dbf'.


For indexing I use following method on the INIT event of Form1

SELECT LOGIN
INDEX ON USERID TO LOGIN1

So there are no Indexes in Table Designer then what is meaning of "Tag not found"?
How to get rid of this message?

Please help