OK...So I tried your suggestion as I have doing surgery in SQL dbases.

Here is what happened:

I go to said topic...open manage topic and click on "make global announcement" again per your instructions.

Then I get this error message:

UBB Message
We encountered a problem. The reason reported was
Script: /home/76/02/1050276/web/forums/scripts/stickpost.inc.php
Line#: 108
SQL Error: Duplicate entry '36341-ubbt_all_forums' for key 1
SQL Error #: 1062
Query: INSERT INTO ubbt_ANNOUNCEMENTS VALUES ( 36341 , 'ubbt_all_forums' )
Please click back to return to the previous page.

Next I reload the forum...and go to manage topic drop down again.

Much to my surprise I now see the "remove from global announcement" option present on the drop down menu. Of course I click on it and Wallah...It worked!

So far everything is working fine and the announcement is history.

Thank you for your help.