Hi @manickavasakam_selvam
You have several options.
OPTION 1
Go to the master file of your titleblock. Take the titleblock to the Block Editor and change the attribute so it's correct. Exit block editor making sure you save the changes when exiting. From this point forward, whenever you use this revised titleblock, the new attribute value will be displayed.
*Also, make sure you do not re-name the block, keep the existing name. You may now re-insert this NEW titleblock to any drawing that is using the OLD titleblock. Since your titleblock still has the name, AutoCAD will ask you if you want to 'Redefine' the block (redefine=replace). Yes, you want to replace the OLD block with the NEW one.
OPTION 2
Open the block in in the Block Editor. Change the Default to the desired value. Whenever you use this edited block, the default value will be automatically displayed. You may also overwrite the default if you wish to display a different attribute value. You may overwrite the default in any dwg where your titleblock is being used.
OPTION 3
Don't use an attribute. You may use attributes anywhere within your titleblock but you don't have to necessarily have to use an attribute. For a piece of TEXT that will remain the same, then you may simply use mtext, not an attribute. In the future, you may edit the mtext in the block editor if needed (delete it or replace that mtext with an attribute).
Chicagolooper
