The overall title block "STOCKLIST-B" has a nested block "DCXHTB-E", which has a nested block "DCXHATT-D" which has duplicate attributes (and other info and linework). Due to the nesting, you can't edit the attributes in the "DCXHATT-D" block.
Explode the title block "STOCKLIST-B" , then issue the Move command, and pick the work Chrysler to find the nested block "DCXHTB-E". Note you can't edit it's information; explode it to find the duplicate set of attributes in the separate block "DCXHATT-D", which you can now edit since it is a top level block...