I have 2 drawings A & B.
Both drawing created a block named as "ABC".
After that, I add an attribute into block "ABC" at drawing A.
I type an attribute value "100" in drawing A.
Then copy that block to drawing B.
Drawing B show "ABC" with attribute value "100".
But I cannot delete the attribute and tag in Drawing B.
I used Block Editor show nothing on tag.
How can I delete the "100"?